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White Diamond and Blue Sapphire Art Deco Ring in 18 White Gold
By Kothari
Located in Los Angeles, CA
Beautiful white diamond round and blue sapphire square ring. Handmade in 18k white gold. Ring size 3.5.
Category

Vintage 1920s Cocktail Rings

Materials

White Diamond, Blue Sapphire, White Gold

GIA 0.70's each Round Brilliant Diamond Eternity Band Ring in 18K White Gold
By Kothari
Located in Los Angeles, CA
Beautiful 8.40 ct. white diamond HIJ VS2-SI2 white diamond rounds Total of 12 stones. Handmade in 18k white gold. Ring size 6. All stones have a GIA certificate.
Category

21st Century and Contemporary Band Rings

Materials

Diamond, White Gold

Estate Tiffany & Company Schlumberger Yellow Gold Earrings in 18K Yellow Gold
By Jean Schlumberger
Located in Los Angeles, CA
Beautiful estate Tiffany & Company Schlumberger 18k yellow gold earrings.
Category

20th Century Lever-Back Earrings

Materials

Yellow Gold

Estate Tiffany & Co White Diamond Round Ring in Platinum
By Tiffany & Co.
Located in Los Angeles, CA
Beautiful estate Tiffany & Company white diamond round band ring. Handmade in platinum. Ring size
Category

21st Century and Contemporary Band Rings

Materials

White Diamond, Platinum

GIA 10 Carat Color Change Alexandrite Oval and White Diamond Ring in Platinum
Located in Los Angeles, CA
Gorgeous 10.31 ct. color change alexandrite oval with 2.5 ct. good quality white diamond baguettes. Handmade in platinum. Ring size 7. Comes with GIA certificate.
Category

21st Century and Contemporary Cocktail Rings

Materials

Alexandrite, White Diamond, Platinum

Diamond Oval and Round Cluster Style Necklace in 14K White Gold
Located in Los Angeles, CA
Gorgeous necklace featuring a 2.01 ct. oval center and smaller round diamonds. Handmade in 14k white gold. Length is 16".
Category

21st Century and Contemporary Link Necklaces

Materials

Diamond, White Diamond, White Gold

GIA Multi Shape Bezel Diamond Dangle Earrings in 18K Yellow Gold
Located in Los Angeles, CA
Gorgeous 4.21 ct. IJ VS-SI white diamonds. Each stone is 0.50 ct. Handmade in 18k yellow brushed gold with push back setting. All stones come with GIA certificates. There are 8 p...
Category

21st Century and Contemporary Dangle Earrings

Materials

Diamond, Yellow Gold

GIA Half Carat Each White Diamond Round Bezel Bracelet in 18K Yellow Gold
Located in Los Angeles, CA
Gorgeous 8.67 ct. K VVS-SI white diamond rounds. Total of 17 stones, each one is 0.50 ct. All stones come with GIA certificates. Length of bracelet is 7". Handmade in 18k yellow ...
Category

21st Century and Contemporary Modern Bracelets

Materials

White Diamond, Yellow Gold

GIA Pear Shape East West Half Carat Each White Diamond Necklace in 18K
Located in Los Angeles, CA
Gorgeous 28.73 ct. IJ VVS-SI white diamond pear shapes. A total of 47 stones. The stones are 0.50 ct to 1.00 ct. each. All stones come with GIA certificates. Handmade in 18k whit...
Category

21st Century and Contemporary Link Necklaces

Materials

White Diamond

16 Carat Aquamarine Emerald Cut and White Diamond Necklace in 14K Yellow Gold
Located in Los Angeles, CA
Gorgeous 16 carat emerald cut aquamarine with 0.40 ct. good quality white diamond rounds. Handmade in 14k yellow gold. Length is 15".
Category

21st Century and Contemporary Pendant Necklaces

Materials

Aquamarine, White Diamond, Yellow Gold

Lavender Jade Oval Cabochon Ring in 18K Yellow Gold
Located in Los Angeles, CA
Gorgeous big lavender jade oval cabochon in a handmade 18k yellow gold mounting. Ring size 7.5.
Category

21st Century and Contemporary Cocktail Rings

Materials

Jade, Yellow Gold

Turquoise Cabochon Floral Earrings in 18K Yellow Gold
Located in Los Angeles, CA
Beautiful 18k yellow gold earrings with turquoise cabochons. Handmade and very light weight. Push back setting.
Category

21st Century and Contemporary Stud Earrings

Materials

Turquoise, Yellow Gold

GIA 2 Carat Oval White Diamond Bezel Pendant Necklace in 18K Yellow Gold
Located in Los Angeles, CA
Beautiful 2.02 ct. K SI2 white diamond oval. Handmade in 18k yellow gold. Length is 18". GIA certificate included.
Category

21st Century and Contemporary Pendant Necklaces

Materials

White Diamond, Yellow Gold

Blue Sapphire Round Necklace in 18K Yellow Gold & Black Rhodium
Located in Los Angeles, CA
Beautiful 34.03 ct. bright blue sapphire rounds in alternating sizes. Handmade in 18k yellow gold and black rhodium. A total of 49 stones from 5- 6.5 mm each. Length is 16".
Category

21st Century and Contemporary Link Necklaces

Materials

Blue Sapphire, Yellow Gold, Rhodium

9.50 Carat Pear Shape East West Diamond Bezel Ring in 18K Yellow Gold
Located in Los Angeles, CA
Gorgeous 9.50 ct. pear shape diamond. Handmade in 18k yellow gold and set sideways in the east to west setting. Ring size 6.5.
Category

21st Century and Contemporary Solitaire Rings

Materials

Diamond, Yellow Gold

2 Carat White Diamond Oval and Trillion Three Stone Ring in Platinum
Located in Los Angeles, CA
Beautiful 2.01 ct. good quality, white, and bright diamond oval with 0.41 ct. trillion diamonds. Handmade in platinum. Ring size 6.75.
Category

21st Century and Contemporary Three-Stone Rings

Materials

White Diamond, Platinum

IGI 0.20 Carat Each Round White Diamond Necklace in 18K Yellow Gold
Located in Los Angeles, CA
Gorgeous 11.92 ct. HI VVS-SI white diamond rounds. Total of 63 stones. Handmade in 18k yellow gold. Length is 16". Each stone comes with an IGI certificate.
Category

21st Century and Contemporary Link Necklaces

Materials

White Diamond, Yellow Gold

IGI 0.20 Carat Each Round Diamond Necklace in 18K Yellow Gold and Black Rhodium
Located in Los Angeles, CA
Beautiful 13.33 ct. HI VVS-SI white diamond rounds. Total of 63 stones, each one is 0.20 ct. Comes with IGI certificates. Length is 15". Handmade in 18k yellow gold and black rho...
Category

21st Century and Contemporary Link Necklaces

Materials

Diamond, Yellow Gold, Rhodium

GIA 0.90 Carat Each Asscher Cut Diamond Eternity Band Ring 18K White Gold
Located in Los Angeles, CA
Gorgeous 11.72 ct. IJ VVS-VS white diamond asscher cut band. Total of 13 stones, each one is 0.90 ct. Handmade in 18k white gold. Ring size 6. Each stone comes with a GIA certific...
Category

21st Century and Contemporary Band Rings

Materials

Diamond, White Gold

12 Carat Watermelon Rectangular Tourmaline Necklace in 18K White Gold
Located in Los Angeles, CA
Beautiful 12.00 ct. watermelon tourmaline rectangle. Handmade in 18k white gold. Length is 17".
Category

21st Century and Contemporary Pendant Necklaces

Materials

Tourmaline, White Gold

GIA Burma Ruby Round and Diamond Baguette Hoop Earrings in Platinum
Located in Los Angeles, CA
Gorgeous GIA Burma ruby rounds with good quality white diamond baguettes. Handmade in platinum. Comes with GIA certificate.
Category

21st Century and Contemporary Hoop Earrings

Materials

Diamond, Ruby, Platinum

Blue Sapphire Emerald Cut Bracelet in 18K White Gold
Located in Los Angeles, CA
Gorgeous 14.31 ct. blue sapphire emerald cut tennis bracelet. Total of 49 stones. Handmade in 18k white gold. Length is 6.75".
Category

21st Century and Contemporary Modern Bracelets

Materials

Blue Sapphire, White Gold

Aquamarine, Pink Tourmaline and White Diamond Ring in 18K Two Tone Gold
Located in Los Angeles, CA
Stunning 1.20 ct. aquamarine pear shape and pink tourmaline pear shape with good quality white diamond rounds. Handmade in 18k white and yellow gold. Ring size 4.5.
Category

21st Century and Contemporary Cocktail Rings

Materials

Aquamarine, White Diamond, Tourmaline, Gold

GIA Asscher Cut Diamond Bracelet in 18K Yellow Gold & Black Rhodium
Located in Los Angeles, CA
Gorgeous 20.87 ct. IJ FL-VS2 white diamond asscher cuts. Handmade in 18k yellow gold and black rhodium. Total of 23 stones, each one is 0.90 ct. Length is 7". Each stone comes wi...
Category

21st Century and Contemporary Modern Bracelets

Materials

Diamond, Yellow Gold, Rhodium

Peridot and Diamond Multi-Strand Necklace in 14K Yellow Gold
Located in Los Angeles, CA
Gorgeous bright green peridot beads with a handmade 14k yellow gold diamond clasp. Length is 17".
Category

21st Century and Contemporary Multi-Strand Necklaces

Materials

Diamond, Peridot, Yellow Gold

GIA White Diamond Round Riviera Necklace in Black Rhodium & 18K Yellow Gold
Located in Los Angeles, CA
Gorgeous 29.20 ct. IJ VVS-SI white diamond rounds. Total of 63 stones. Handmade in black rhodium and 18k yellow gold. Length is 16". Each stone comes with a GIA certificate.
Category

21st Century and Contemporary Link Necklaces

Materials

White Diamond, Yellow Gold, Rhodium

GIA 1 Carat Marquise Diamond East West Pendant Necklace in 18K Yellow Gold
Located in Los Angeles, CA
Beautiful 1.00 ct. L VS2 white diamond marquise shape. Handmade in 18k yellow gold. Length is 17.5". Comes with a GIA certificate.
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Yellow Gold

GIA 0.30 Carat Each Round Diamond Bracelet in Black Rhodium and 18K Yellow Gold
Located in Los Angeles, CA
Gorgeous 8.91 ct. HI VVS-SI white diamond rounds. Total of 28 stones, each one is 0.30 ct. Handmade in 18k yellow gold and black rhodium. Each stone comes with a GIA certificate. ...
Category

21st Century and Contemporary Modern Bracelets

Materials

Diamond, Yellow Gold, Rhodium

Multi-Color and Diamond Multi-Shape Dangle Earrings in 14K Yellow Gold
Located in Los Angeles, CA
Beautiful earrings with multi color gem stones an good quality white diamonds. Handmade in 14k yellow gold. Clip and post back.
Category

Late 20th Century Dangle Earrings

Materials

Diamond, Yellow Gold

4 Carat Blue Sapphire Oval and White Diamond Pendant in Platinum
Located in Los Angeles, CA
Beautiful 4.15 ct. blue sapphire oval with 0.03 ct. of good quality white diamond rounds. Handmade in platinum.
Category

21st Century and Contemporary Pendant Necklaces

Materials

White Diamond, Blue Sapphire, Platinum

Estate Bueche Girod White Diamond Marquise Watch
By Bueche Girod
Located in Los Angeles, CA
Beautiful estate Bueche Girod white diamond marquise and yellow gold watch.
Category

Late 20th Century Wrist Watches

Materials

White Diamond

GIA 2 Carat Each White Diamond Cushion Dangle Earrings in 18K Yellow Gold
Located in Los Angeles, CA
Beautiful 4.04 ct. IJ SI white diamond cushions. One stone is J SI1 and one stone is I SI1. Handmade in 18k yellow gold. Comes with GIA certificates.
Category

21st Century and Contemporary Dangle Earrings

Materials

White Diamond, Yellow Gold

White Diamond Baguette Horseshoe Pendant Necklace in 18K White Gold
Located in Los Angeles, CA
Gorgeous 1.50 ct. good quality, white and bright diamond baguettes. Handmade in 18k white gold. Length is 16".
Category

21st Century and Contemporary Pendant Necklaces

Materials

White Diamond, White Gold

White Diamond Baguette and Round Band Ring in Platinum
Located in Los Angeles, CA
Beautiful band with good quality white diamond baguettes and rounds. Handmade in platinum. Ring size 9.
Category

21st Century and Contemporary Band Rings

Materials

White Diamond, Platinum

GIA Thai Purplish Red Ruby Oval and Heart Diamond Ring in Platinum & 18K Gold
Located in Los Angeles, CA
Beautiful 2.05 ct. Thai purplish red ruby oval with 0.80 ct. white diamond hearts. Handmade in 18k yellow gold and platinum. Ring size 6. Comes with GIA certificate.
Category

21st Century and Contemporary Three-Stone Rings

Materials

Diamond, Ruby, 18k Gold, Platinum

White Diamond Marquise and Baguette Ring in 18K Yellow Gold
Located in Los Angeles, CA
Beautiful 1.00 ct. good quality, white, and bright white diamond marquise shapes and baguettes. Handmade in 18k yellow gold. Ring size 6.75.
Category

21st Century and Contemporary Fashion Rings

Materials

White Diamond, Yellow Gold

4.81 Carat Old European Diamond Ring in Black Rhodium & 18K Yellow Gold
Located in Los Angeles, CA
Gorgeous 4.81 ct. Old European Cut diamond. Handmade in 18k yellow gold and black rhodium. Ring size 6.5.
Category

21st Century and Contemporary Solitaire Rings

Materials

Diamond, Yellow Gold, Rhodium

White Round Diamond Half Tennis and Paperclip Necklace in 14K Yellow Gold
Located in Los Angeles, CA
Beautiful 5.37 ct. good quality, white, and bright diamond rounds. Handmade in 14k yellow gold. Length is 16". A great piece to layer with others or wear on it's own.
Category

21st Century and Contemporary Link Necklaces

Materials

Diamond, Yellow Gold

GIA 3.72 Carat Pear Shape Diamond Ring in Platinum
Located in Los Angeles, CA
Beautiful 3.72 ct. K SI white diamond pear shape with good quality white diamond rounds. Handmade in platinum. Ring size 7. Comes with GIA certificate.
Category

21st Century and Contemporary Solitaire Rings

Materials

Diamond, Platinum

GIA White Diamond Round Dangle Earrings in 18K Yellow Gold
Located in Los Angeles, CA
Beautiful 2.23 ct. IJ SI white diamond rounds. Handmade in 18k yellow gold matte finish. One stone is I SI1 and the other is J SI1. Comes with GIA certificates.
Category

21st Century and Contemporary Dangle Earrings

Materials

White Diamond, Yellow Gold

GIA 3.42 Carat Fancy Gray Pear Diamond Pendant Necklace in 14K Rose Gold
Located in Los Angeles, CA
Gorgeous 3.42 ct. GIA fancy gray diamond pear shape. Handmade in 14k rose gold. Length of necklace is 15". Comes with GIA certificate.
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Rose Gold

White Diamond Baguette and Round Ring in Platinum
Located in Los Angeles, CA
Beautiful white diamond round and baguette ring. Handmade in platinum. Ring size 9.
Category

21st Century and Contemporary Fashion Rings

Materials

White Diamond, Platinum

GIA 1.25 Carat Fancy Yellowish Green Diamond Ring in 18K Rose Gold and Platinum
Located in Los Angeles, CA
Gorgeous 1.25 ct. fancy yellowish green diamond with good quality white and pink diamonds. Handmade in 18k rose gold and platinum. Ring size 6.25. Comes with a GIA certificate.
Category

21st Century and Contemporary Solitaire Rings

Materials

Diamond, Rose Gold, Platinum

GIA 13 Carat Orange Sapphire Octagonal Ring in 18K Gold and Black Rhodium
Located in Los Angeles, CA
Gorgeous 13.04 ct. orange sapphire octagon. Handmade in 18k yellow gold and black rhodium. Ring size 6.5. Comes with GIA certificate.
Category

21st Century and Contemporary Cocktail Rings

Materials

Sapphire, 18k Gold, Rhodium

Marquise White Diamond Snake Ring in 14K Yellow Gold
Located in Los Angeles, CA
Beautiful 1.60 ct. white and bright diamond marquise. Handmade in 14k yellow gold. Ring size 5.5.
Category

21st Century and Contemporary Cocktail Rings

Materials

White Diamond, Yellow Gold

Pink Tourmaline Oval White Diamond Round Bracelet in 18K Yellow Gold
Located in Los Angeles, CA
Beautiful pink tourmaline oval and white diamond round bracelet handmade in 18k yellow gold. Length is 7.5".
Category

21st Century and Contemporary Chain Bracelets

Materials

White Diamond, Tourmaline, Yellow Gold

6 Carat Green Jade Oval Cabochon and Baguette Diamond Ring in Platinum
Located in Los Angeles, CA
Gorgeous 6.36 ct. green jade oval cabochon with 2.02 ct. white diamond baguettes. Handmade in platinum. Ring size 8.
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Jade, Platinum

Green Jade Oval Cabochon and White Diamond Ring in Platinum
Located in Los Angeles, CA
Beautiful 2.75 ct. green jade oval cabochon with 0.77 ct. good quality, white, and bright diamond rounds and marquise shapes. Handmade in platinum. Ring size 6.5.
Category

21st Century and Contemporary Cocktail Rings

Materials

White Diamond, Jade, Platinum

Ruby Cushion and White Diamond Ring in Platinum
Located in Los Angeles, CA
Beautiful 2.70 ct. ruby cushion with 2.13 ct. good quality white diamond baguettes and rounds. Handmade in platinum. Ring size 6.5.
Category

21st Century and Contemporary Fashion Rings

Materials

White Diamond, Ruby, Platinum

White Diamond Marquise Pendant Necklace in 18K Yellow Gold
Located in Los Angeles, CA
Beautiful 1.50 ct. I I1 white diamond marquise. Handmade in 18k yellow gold. Diamond comes with EGL report.
Category

21st Century and Contemporary Pendant Necklaces

Materials

White Diamond, Yellow Gold

GIA 0.30 Carat Each Diamond Pear Shape Dangle Earrings in 18K White Gold
Located in Los Angeles, CA
Beautiful 5.69 ct. FG SI white diamond pear shapes and 0.10 ct. small white diamond rounds. Total of 18 stones, each one is 0.30 ct. Handmade in 18k white gold. GIA certificates a...
Category

21st Century and Contemporary Dangle Earrings

Materials

Diamond, White Gold

White Diamond Marquise Ring in Platinum
Located in Los Angeles, CA
Beautiful white diamond marquise band. Diamonds are white, bright and clean. Handmade in platinum. Ring size 7.
Category

21st Century and Contemporary Band Rings

Materials

White Diamond, Platinum

White Diamond Marquise and Round Necklace in 14K White Gold
Located in Los Angeles, CA
Beautiful 2.25 ct. white diamond marquise and round necklace. Handmade in 14k white gold. Length is 18.5".
Category

21st Century and Contemporary Pendant Necklaces

Materials

White Diamond, White Gold

Guild 5 Carat Burma Ruby Cushion and Trapezoid Diamond Ring in 18K Yellow Gold
Located in Los Angeles, CA
Gorgeous 5.26 ct. Burma ruby cushion with 0.74 ct. good quality white diamond trapezoids. Handmade in 18k yellow gold. Guild certificate is included. Ring size 6.5.
Category

21st Century and Contemporary Three-Stone Rings

Materials

Diamond, Ruby, Yellow Gold

White Diamond Marquise Semi Hoop Earrings in 18K White Gold
Located in Los Angeles, CA
Gorgeous 2.50 ct. good quality, white, and bright diamond marquises. Handmade in 14k white gold.
Category

21st Century and Contemporary Hoop Earrings

Materials

White Diamond, White Gold

Three Stone White Diamond Pear Shape Ring in 14K Yellow Gold
Located in Los Angeles, CA
Beautiful 0.95 ct. white diamond pear shapes. Handmade in 14k yellow gold. Ring size 4.5.
Category

21st Century and Contemporary Fashion Rings

Materials

White Diamond, Yellow Gold

Ruby Emerald Cut Eternity Band Ring in 18K Yellow Gold
Located in Los Angeles, CA
Gorgeous 8.30 ct. ruby emerald cuts. Total of 17 stones. Handmade in 18k yellow gold. Ring size 6.
Category

21st Century and Contemporary Band Rings

Materials

Ruby, Yellow Gold

Estate Chanel Agate, Onyx and Diamond Camelia Ring in 18K White Gold
By Chanel
Located in Los Angeles, CA
Estate Chanel agate, onyx, and white diamond Camelia ring handmade in 18k white gold. Ring size 6.75.
Category

21st Century and Contemporary Fashion Rings

Materials

Agate, Diamond, Onyx, White Gold

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Kothari Company Inc For Sale on 1stDibs

Find the exact kothari company inc you’re shopping for in the variety available on 1stDibs. Every item for sale was constructed with extraordinary care, often using gold, white gold and yellow gold. In our selection of items, you can find a vintage example as well as a contemporary version. Finding the perfect kothari company inc may mean sifting through those created during different time periods — you can find an early version that dates to the 20th Century and a newer variation that were made as recently as the 21st Century. Creating a kothari company inc has been a part of the legacy of many jewelers, but those produced by H. Stern, Kabana and Bulgari are consistently popular. Take a look at a kothari company inc featuring diamond from our inventory today to add the perfect touch to your look. See these pages for a round cut iteration of this accessory, while there are also oval cut cut and emerald cut cut versions available here, too. Most of our kothari company inc for sale are for men, but there are 2511 pieces available to browse for women.

How Much is a Kothari Company Inc?

On average, a kothari company inc at 1stDibs sells for $8,075, while they’re typically $450 on the low end and $1,000,000 for the highest priced versions of this item.

The Legacy of Diamond in Jewelry Design

Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands.

From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone. But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!

There are several factors that set diamonds apart from other stones, and these points are important to our gem education.

Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality.

In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. Not all diamonds are created equal (there are diamonds, and then there are diamonds). The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).

When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And on 1stDibs, a range of buying guides can be found for those in the market for antique engagement ringsvintage engagement rings or Art Deco engagement rings

Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.