Untreated Gems

The gemstone at the centre of this opal ring is an Australian black opal with a strong dominant red, the rarest and most desirable of all colours in Australian opals. It is a natural...

The origin of the gemstone is Eastern Africa. Red and Pink untreated gems are becoming rare and hence this is definitely an "investment gemstone"!

The origin of the gemstone is Madagascar. Red untreated gems are becoming rare and hence this is definitely an "investment gemstone"!

What sets it apart is its natural, untreated quality, preserving the gem's pure characteristics as created by nature.

Unlike most on the market, this stone is 100% natural and untreated, a testament to its authenticity and exceptional quality.

Excellent condition, the necklace has been restrung with silk for safe wear and best presentation Further Details Below Metal: 18 Kt white gold Hallmarks: assay Gems: 43 natural un...

This natural marvel turns a beautiful gem into a truly enchanted treasure. 🧾 Certified, Untreated, and Rare This gem comes certified for authenticity and origin, and is completely ...

The 4.26 carat antique-cut sapphire stands out for its untreated cornflower blue color. The gem is a miracle of nature – perfectly shaped by an expert gemcutter.

Ring Information Center Gem: ~ Natural untreated Rhodolite Garnet ~ Gemstone Size: 5.2 mm ~ Round Cut ~ GIA Color & Clarity : medium-light Purple-Red , Type I (Eye Clean) ~ Gemstone...

I love the Fengguan's sensual sway and mysterious drape over the eyes: it’s sexy and powerful all at once.” – Alexia Connellan The Gems: The untreated spessartite garnets in the stu...

This 1960 ca stunner is a classy must of the Italian high end jewellery Coral jewellery has enchanted the world from centuries, the endless appeal of Coral is sought after and collec...

Excellent condition, 11.3 grams in weight Further Details Below Metal: 18 Kt yellow gold and platinum, tested Hallmarks: none/worn Gems: 10 natural untreated Persian turquoise of 6...

The ring weighs 16.8 grams It measures 17 mm. at the widest point It can be re-sized Further Details Below Metal: 18 Kt yellow gold Hallmarks: assay Gems: 1 natural untreated caboc...

Unheated Pink Purple Sapphire 0.47ct Oval Cut Loose Untreated Gem 5 x 3.8mm Natural Untreated Pinkish Purple Sapphire. 0.47 Carat sapphire with a beautiful pink purple colour and a...

1.46ct Unheated Blue Green Yellow Sapphire Oval Cut IGI Certified Untreated Gem Bluish Yellowish Green Untreated Sapphire In IGI Blister. 1.46 Carat with an excellent oval cut and ...

1.45ct AIG Certified Green Blue Sapphire Oval Cut Rare Untreated Gem No Heat AIG Certified Blue Green Untreated Sapphire Gemstone. 1.45 Carat sapphire with a beautiful blue green co...

Natural Untreated Green Australian Sapphire Gemstone. 1.12 Carat with a beautiful vivid green colour and good clarity, a clean stone with only some small natural inclusions visible ...

Rare and exclusive 5.05 carat Burmese Red Spinel cushion cut gem. This pristine, collection quality, untreated gem, is offered loose and would make an exceptional, unisex, custom mad...

This ring combines timeless craftsmanship with the rarity of a natural, untreated gem, making it a treasured piece for collectors and lovers of fine jewelry.

Handmade custom cut bright blue Lapis cufflinks with untreated gem blue Lapis. Wave design. Secure clips and solid 18k yellow gold. 18k yellow gold 2 fancy bright blue wave cut Lapi...

Zircon is not to be confused with "cubic zirconia", which is a synthetic gem. This is a natural and untreated gem of a lovely avocado green.

Natural Untreated Green Sapphire Gemstone. 0.71 carat stone with a beautiful green colour and good clarity, a clean stone with only some small natural inclusions visible when lookin...

GIA Certified 1.46Ct Untreated 'Lagoon' Blue Green Sapphire Cushion Cut Gem Natural GIA Certified Untreated Blue Green Sapphire Gemstone. 1.46 Carat unheated sapphire with a beautif...

Fine Natural Untreated Australian Green Sapphire Gemstone. 1.12 Carat with a beautiful yellow green colour and an excellent emerald octagon cut. Also has very good clarity, a very c...

Fine Royal Blue Untreated Australian Sapphire Gemstone. 0.83 Carat with a beautiful royal blue colour and very good clarity. Very clean stone with only some small natural inclusions...

Rare Natural Untreated Colour Change Sapphire. 1.21 Carat with an excellent triangle trillion cut. This sapphire changes colour depending on the light its viewed in. Very rare for ...

GIA Certified Untreated Yellow Sapphire Gemstone. 1.04 Carat unheated sapphire with a beautiful vivid yellow colour. Fully certified by GIA confirming stone as natural and untreated...

Natural GIA CERTIFIED Colour Change Sapphire 1.00ct UNTREATED Oval Cut RARE Gem GIA Certified Rare Untreated Colour Change Blue Green - Purple Sapphire Gemstone. 1.00 Carat unheated...

The stone's deep red hue is both rich and intense, reminiscent of the most coveted rubies, yet with its own distinct sparkle. As a natural, untreated gem, it retains its authentic be...

Fully certified by IGI in Antwerp, one of their best and most well equipped gem labs. Confirming stone as natural and untreated.

Natural Fancy Orange loose diamond. 0.15 carat. Untreated stone with rare and natural Fancy orange colour.

Fully certified by IGI in Antwerp, one of the best and most well equipped gem labs. This stone is totally untreated and unheated which is very rare for sapphires.

Fully certified by IGI in Antwerp, one of the best and most well equipped gem labs. Totally untreated and unheated, very rare for sapphires.

Natural untreated light blue Sapphire. 1.21 carat stone with a good pear cut. Fully certified by GIA. This stone is totally untreated and unheated which is very rare for blue sapp...

Fine Untreated Greenish Blue Sapphire Gemstone. Fine quality unheated sapphire with a beautiful and unique greenish blue colour. Fully certified by GIA confirming stone as natural a...

Rare Untreated Colour Change Sapphire Gemstone. 1.18 Carat unheated sapphire with a rare colour change effect. Changing colour depending on the light its viewed in. Very rare for na...

Rare Untreated Colour Change Sapphire Gemstone. 1.01 Carat unheated sapphire with a rare colour change effect. Changing colour depending on the light its viewed in. Very rare for na...

Rare Untreated Bi Colour Sapphire Gemstone. 1.79 Carat unheated sapphire with a rare bi colour effect. Showing blue and yellow colours with a unique colour split. Very rare and stun...

Rare Untreated Bi Colour Sapphire Gemstone. 1.37 Carat unheated sapphire with a rare bi colour effect. Showing blue and yellow green colours with a unique colour variation. Very rar...

Deep Greenish Blue ‘Teal’ Sapphire Gemstone. Fine quality unheated sapphire with a beautiful and unique deep greenish blue ‘teal’ colour. Fully certified by GIA confirming stone as...

NATURAL UNHEATED Ruby GIA CERTIFIED Deep Red 0.67ct Heart Cut Untreated RARE Gem GIA Certified Natural Untreated Deep Red Ruby. 0.67 Carat unheated deep red ruby.

1.49ct Deep Blue GIA Certified Untreated Sapphire Pear Cut No Heat Rare Gem Untreated GIA Certified Blue Sapphire Gemstone. 1.49 Carat unheated sapphire with a deep dark blue colour.

Deep Royal Blue Untreated Oval Cut Sapphire IGI Certified 0.63ct Loose Rare Gem Natural Deep Royal Blue Untreated Sapphire In IGI Blister. 0.63 Carat with an excellent oval cut and ...

Fully certified by IGI in Antwerp, one of the best and most well equipped gem labs. This stone is totally untreated and unheated which is very rare for rubies.

Fine quality blue Sapphire with a beautiful and unique teal deep blue colour. Described by GIA as straight ‘blue’ but as photos show, has slight ‘teal’ hues. Very pretty and unique....

Natural A Grade Jadeite Gemstone. 4.51 Carat with an excellent oval cabochon cut. Fully certified by AIG. Totally untreated Jadeite jade, referred to as ‘A’ grade in the trade. Min...

Sourced from Ceylon’s historic deposits, renowned for producing some of the world’s finest sapphires, this untreated gem stands as a testament to nature’s artistry and authenticity.

The centerpiece is an awe-inspiring 62.60-carat square cushion pyramidal cabochon sapphire, with rich, lively blue hues reflecting the stone’s incredible depth and vibrancy. This unt...

Untreated 0.57ct Vivid Green Sapphire Pear Teardrop Cut Gem 5.8 x 4mm Natural Vivid Green Australian Sapphire Gemstone. 0.57 Carat with a beautiful vivid green colour and excellent...

Only The Top 1% Of Sapphires Don't Need It. These Untreated Gems Are The Most Valuable Of All Sapphires.

Fine Australian Blue Purple Sapphire Untreated 0.53ct Cushion Cut Gem 4.5x4.2mm Natural Fine Blue Purple Untreated Australian Sapphire Gemstone. 0.53 Carat with a beautiful vivid b...

Fine 1.02ct Green Untreated Australian Sapphire Octagon Cut 6.4x4.8mm Loose Gem Fine Natural Untreated Australian Vivid Green Sapphire Gemstone. 1.02 Carat with a beautiful vivid g...

Fine 0.74ct Vivid Green Untreated Sapphire Australian Cushion Cut Gem 5 x 4.6mm Fine Natural Untreated Vivid Green Sapphire Gemstone. 0.74 Carat with a beautiful vivid green colour...

Fine 1.12ct Green Untreated Australian Sapphire Octagon Cut 6.3 x 4.2mm Loose Gem Fine Natural Untreated Australian Green Sapphire Gemstone. 1.12 Carat with a beautiful yellow gree...

Fine Yellow Australian 0.84ct Untreated Sapphire Pear Teardrop Cut Gem 6.5 x 5mm Fine Natural Untreated Yellow Australian Sapphire Gemstone. 0.84 Carat with a beautiful vivid yello...

Vivid Yellow Untreated Australian Sapphire 0.49ct Pear Cut 6.4 x 4.3mm Loose Gem Natural Australian Yellow Sapphire Gemstone. 0.49 Carat with a beautiful vivid yellow colour and an...

1.00ct Natural Parti Colour Blue Green Thai Sapphire Oval Loose Gem 6.5X4.5mm Natural Blue Green Parti Colour Thai Sapphire Gemstone. 1.00 Carat with a beautiful and unique green bl...

Unique GIA Certified Australian Parti Colour Sapphire 1.39ct Yellow Blue Oval Unique GIA Certified Untreated Parti Colour Sapphire. 1.39 Carat unheated sapphire with a unique yellow...

GIA Certified 1.32ct Natural Deep Teal Green Blue Untreated Sapphire Cushion Cut Natural Bi Colour Teal Blue Green Untreated Cushion Cut Sapphire Gemstone. 1.32 Carat sapphire with ...

UNIQUE 1.63ct NATURAL Blue Green PARTI Colour Sapphire Oval Cut RARE 7.2x6mm VS Fine Natural Parti Colour Blue Green Yellow Sapphire Gemstone. 1.63 Carat with a unique blue green ye...

Natural Deep Teal Blue Sapphire 1.02ct Gia Certified 5.8x4.7mm Oval Untreated GIA Certified Untreated Deep Teal Blue Sapphire Gemstone. 1.02 Carat sapphire with a beautiful deep tea...

1.22ct Natural Sapphire Bluish Green Gia Certified Unheated Oval Cut Untreated GIA Certified Natural Untreated Bluish Green Sapphire Gemstone. Fine quality unheated sapphire with a ...

1.04ct Unique IGI Certified Bi Colour Blue Yellow Australian Sapphire Gemstone IGI Certified Australian Bi Colour Blue Yellow Sapphire Pear Cut Gem. 1.04 Carat with a unique blue ye...

Unique 1.33ct Natural Australian Bi Colour Yellow Green Sapphire Pear 7.1x6.9mm Natural Vivid Yellow Green Bi Colour Pear Cut Australian Sapphire Gemstone. 1.33 Carat with a beautif...

Natural Uncut Diamond Stacking Band Ring in 18K Gold symbolizes the everlasting love between a couple. It shows the infinite love you have for your partner. The round shape represent...

This Blue Sapphire Eternity Band Ring is expertly crafted in 925 sterling silver. The band features a sleek channel setting adorned with round-cut deep blue sapphire gemstones, offer...

A vibrant pair of sterling silver stud earrings featuring a total of 7.79 carats of oval citrine, each stone glowing with warm golden brilliance. A crisp halo of white quartz surroun...

Weight 1.06 carats Dimensions 7.0x5.1x3.1 mm Treatment Heated Origin Madagascar Clarity SI Shape oval Cut Faceted This stunning 1.06 carat teal blue sapphire from Madagascar ...

Marked “14KT Italy Milor” Weight: 2.1g Measurements: Approx. 2.00" L x 0.64" W Pre-owned These 14K Italian Yellow Gold Twist Dangle Earrings offer the elegance and fluidity that It...

18k carved blue Octopus Intaglio on white Cocolite enhancer. Sapphire bail.

An 18 karat (18K) yellow gold curb link chain bracelet with hollow curb links and a spring ring clasp. Fitted with a safety chain to the clasp. Stamped with the French import mark an...

Loose Bi Colour Sapphire Weight: 1.63 Carats Sizes: 8.30 x 6.56 x 3.76 Mm Origin: Madagascar, Africa Shape: Oval Colour: Blue / Yellow Treatment: Heat Enhancement Certificate: AIG C...

Indigo Blue Sapphire 0.75ct Natural Australian Cushion Cut Loose Gem 5.8x4.5mm Natural Australian Blue Sapphire Gemstone. 0.75 Carat with a deep blue colour and excellent clarity, p...

Antique Crescent Pendant 9ct Yellow Gold & Silver Tested Circa 1880 This Victorian crescent moon pendant is truly a stunning piece of jewellery that is sure to catch everyone's e...

Natural Green Blue Teal Sapphire 0.87ct Australian Cushion Cut Gem 6.3x4.6mm Natural Australian Blue Sapphire Gemstone. 0.87 Carat with a blue colour and excellent clarity, practica...

Unique Deep Blue Green Bi Colour Sapphire And Diamond Three Stone 950 Platinum Ring. 2.55 Total Carat. 2.05 Carat centre sapphire with a deep blue green bi colour effect. Fascinati...