Colleen B. Rosenblat believes that “it is not we who select the jewelry, but the jewelry that selects us.” Based in Hamburg, Germany, she is known for her contemporary pieces that feature unconventional color and form along with fine materials like pearls, precious gemstones and gold and silver.
When she was a child, Rosenblat stumbled across some smoky quartz in the forest. It ignited a passion for gemology and jewelry that took her around the world. As a teenager, she used a handful of jewelry-making tools borrowed from a friend to craft her own pieces out of silver.
Trips to Australian and Indonesian gemstone mines solidified her focus, and Rosenblat applied to study at the Gemology Institute of America in Los Angeles. After graduation, she studied in Idar-Oberstein in Germany, finished a goldsmith apprenticeship in Frankfurt and earned a jewelry design diploma from Parsons School of Design in New York. She then split her time between the United States and Germany, working as a freelance goldsmith for several years before opening her own workshop and award-winning showroom in Hamburg.
Designed by American architect and interior designer Michael Gabellini, Rosenblat’s showroom luxuriously presents her jewelry. Handmade furniture by American woodworker George Nakashima complements the interior. In 2000, the American Institute of Architects in Philadelphia awarded it the Institute Honor Award for Interior Architecture.
Rosenblat continues to produce exquisite jewelry under her brand. Her work has been featured in high-end fashion magazines such as Vogue, Elle, Harper’s Bazaar, Vanity Fair, InStyle and GQ.
On 1stDibs, find a collection of Colleen B. Rosenblat rings, earrings, necklaces and more.
Colleen B. Rosenblat South Sea Baroque Pearl Gold Necklace with Gold Clasp
By Colleen B. Rosenblat
Located in Hamburg, DE
Everyone should have one pearl necklace in his jewelry box, especially when it comes along with noble shiny southsea baroque pearls with a 22k yellow gold clasp topped off with Colle...
South Sea Pearl, 22k Gold, Yellow Gold, Gold
Colleen B. Rosenblat Amber Gold Necklace
By Colleen B. Rosenblat
Located in Hamburg, DE
stunning and impressive handmade amber necklace in 22k yellow gold from the “one of a kind” collection by Colleen B. Rosenblat. This necklace is 55 cm long and between 4.5 cm and 5.6...
Amber, 22k Gold, Yellow Gold
Certified 31.70 Carat Rose Quartz Scarab Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
In old Egypt the scarab was a symbol for resurrection and life and since that time a lucky charm for everyone. This desirable 18k rose gold ring have a 31.70...
Quartz, 18k Gold, Rose Gold
4.56 Carat Brazilian Paraiba Tourmaline Emeralds Studs
By Colleen B. Rosenblat
Located in Hamburg, DE
Stunning Studs with 2 Emeralds 8.34 Carat and very rare Brazilian Paraiba Tourmaline 4.56 Carat. The earrings are unique. 18 Carat White G...
Emerald, Tourmaline, 18k Gold, White Gold
Colleen B. Rosenblat Zircon Gold Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
This shape is one of the favored in our middle ages collection. A blue vibrant and breathtaking zircon 10.93 ct adorns the 18k white gold setting. Ring size: 57
Zircon, 18k Gold, White Gold
Statement Earrings with African Paraiba Tourmalines of 28.13 Carat
By Colleen B. Rosenblat
Located in Hamburg, DE
Precious basics earrings with African paraiba tourmalines of 28.13 ct set in 18 carat white gold.
Tourmaline, 18k Gold, White Gold
Colleen B. Rosenblat Chrysoprase Necklace
By Colleen B. Rosenblat
Located in Hamburg, DE
This chrysophrase necklace brings the spring into your life. The clasp is set in 18 K white gold. It is designed by Colleen B. Rosenblat.
Chrysophrase, 18k Gold, White Gold
Colleen B. Rosenblat Amethyst Gold Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
A fascinating 26.26 ct amethyst is embedded in a 18kt rose gold setting and design by Colleen B. Rosenblat. This ring is an eye-catcher! Ring size: 56
Amethyst, 18k Gold, Rose Gold, Gold
Colleen B. Rosenblat Stunning Lapis Lazuli Gold Necklace
By Colleen B. Rosenblat
Located in Hamburg, DE
Colleen B. Rosenblat designed this stunning necklace with 26 lapis lazuli with 22k yellow gold hammered gold pieces in between. Width of lapis lazuli balls: 15.5 mm
Lapis Lazuli, 22k Gold, Yellow Gold
Middle Ages Ring, 18 Karat White Gold, Tanzanite 12.05 Carat
By Colleen B. Rosenblat
Located in Hamburg, DE
Inspired by the elements and shapes of the Middle Ages, the collection is one of the most coveted by Colleen B. Rosenblat. Delicate yet bold crosses and stepped rings with large, col...
Tanzanite, 18k Gold, White Gold
Colleen B. Rosenblat Tourmaline Gold Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
Are you ready to wear this beautiful 18k rosé gold ring with a vibrant pink tourmaline 13.08 ct designed by Colleen B. Rosenblat? Ring size: 55
Tourmaline, 18k Gold, Rose Gold
One of a Kind Ring in 18 Carat White Gold, with 1 Aquamarine of 140.4 ct
By Colleen B. Rosenblat
Located in Hamburg, DE
This very special cut could remind you of an iceberg. It has a length of 48 mm and a wide of 29 mm. The head of the ring is 24 mm high. Ring size: 54 (US 6.8) Designed by Colleen B. ...
Aquamarine, 18k Gold, White Gold
Colleen B. Rosenblat 14.45 Carat Indigolite Gold Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
A classic rectangular Ring with an incredible indigolite 14.45 ct in 18k white gold. The blueish green color is exceptionally rare. And elegant & modern ring designed by Colleen B. R...
Tourmaline, 18k Gold, White Gold
Precious Basics Ring, 18 Carat White Gold, 2 African Paraiba Tourmalines 1.86 ct
By Colleen B. Rosenblat
Located in Hamburg, DE
The Precious Basics Collection of Colleen B. Rosenblat is the classic collection for everyday basic and business looks. Elegantly shaped band rings set with unique, coloured gemstone...
Tourmaline, 18k Gold, White Gold
Colleen B. Rosenblat turquoise coral gold necklace
By Colleen B. Rosenblat
Located in Hamburg, DE
Double breasted turquoise necklace with a breathtaking coral clasp in 22k yellow gold. The clasp has the following dimensions: 75.5 mm length and 47.5 mm wide Designed by Coll...
Coral, Turquoise, 22k Gold, Yellow Gold
Hammered Gold Earrings, 18k White and Rose Gold, Cushion Cut Diamonds 4.18 Carat
By Colleen B. Rosenblat
Located in Hamburg, DE
In our workshop, we create pieces of timeless beauty. Each artistically realized piece of jewelry is ultimately as individual as its wearer. HAMMERED GOLD EARRINGS 18 CARAT HAMMERED...
Diamond, 18k Gold, Rose Gold, White Gold
Middle Ages 26.31 Carat Amethyst Cocktail Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
Middle ages ring 18 carat white gold with a wonferful amethyst 26.31 ct. Designed by Colleen B. Rosenblat. The ring size is EU 57 and US 8.
Amethyst, 18k Gold, White Gold
$87,635
Mabe Pearls Gold Necklace
By Colleen B. Rosenblat
Located in Hamburg, DE
Beautiful beaded 22k gold necklace with 19 Marbé pearls. Looks classic and elegant around every neck. Designed by Collenn B. Rosenblat.
Pearl, 22k Gold, Gold, Yellow Gold
Colleen B. Rosenblat Amethysts White Gold Scarab Earrings
By Colleen B. Rosenblat
Located in Hamburg, DE
Two amethyst scarabs 43,73 ct and two small amethysts 0.43 ct adorn the 18k white gold setting. Designed by Colleen B. Rosenblat.
Amethyst, 18k Gold, White Gold
Lug Bracelet in 22 Carat Yellow Gold, 167 Internally Flawless Diamonds
By Colleen B. Rosenblat
Located in Hamburg, DE
precious basics lug bracelet 22 carat yellow gold 167 brilliant cut diamonds 1.44 ct TW/IF
Diamond, 22k Gold, Yellow Gold
Colleen B. Rosenblat tanzanite gold ring
By Colleen B. Rosenblat
Located in Hamburg, DE
The beautiful midnight-blue tanzanite 22.35 ct and 6.71 ct TW/if brilliant cut diamonds make this ring to an impressive eye catcher. Ring size: 56 Designed by Colleen B. Rosenblat
Tanzanite, 18k Gold, White Gold
Certified 21.01 Carat African Paraiba Tourmalines Bracelet
By Colleen B. Rosenblat
Located in Hamburg, DE
Precious basics 18 carat white gold with african paraiba tourmalines 21.01 ct bracelet. Designed by Colleen B. Rosenblat.
Tourmaline, 18k Gold, White Gold
Colleen B. Rosenblat Citrine Gold Bracelet
By Colleen B. Rosenblat
Located in Hamburg, DE
Handmade contemporary bracelet with 5 cabochon citrine 41,29 ct. set in 18K white gold. this one of a kind piece is handmade and designed by Colleen B. Rosenblat
Citrine, 18k Gold, White Gold
Certified 51.21 Carat Mandarine-Garnet Rose Gold Cocktail Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
An eye-catching piece. 18 carat rose gold cocktailring. With an unique Mandarine-Garnet 51.21 ct and 2 Amethysts 2.41 ct in all. The Ring has been designed and handcrafted by Colleen...
Amethyst, Garnet, Mandarin Garnet, 18k Gold, Rose Gold
Colleen B. Rosenblat Brown Tourmaline Rose Gold Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
This ring, set in 18 carat rose gold, captivates with a brown tourmaline 24,28 ct. It is designed by Colleen B. Rosenblat.
Tourmaline, 18k Gold, Rose Gold
Colleen B. Rosenblat Tourmaline Garnet Gold Scarab and Box
By Colleen B. Rosenblat
Located in Hamburg, DE
Box of Scarab with 22K yellow gold, 1 green tourmaline 212ct., 4 red garnet 3,24ct. and 4 green tourmaline 3,76ct.
Garnet, Tourmaline, 22k Gold, Yellow Gold
Certified 6.2 Carat Rubellite Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
Very beautiful 22kt hammered yellow gold ring set with a 6.2 ct Rubelite. The size is 8. Designed by Colleen B. Rosenblat
Rubelite, 22k Gold
Colleen B. Rosenblat Tourmaline Rubellite Aquamarine Gold Scarab Collier
By Colleen B. Rosenblat
Located in Hamburg, DE
This colorful collier with scarab pendants in 18k white gold with big cabochons as tourmalines, rubellites and aquamarines stands in the old Egypt for a lucky charm with the traditio...
Aquamarine, Rubelite, Tourmaline, 18k Gold, White Gold
Middle Ages Ring, 18 Karat White Gold, 1 Emerald 14.86 Carat
By Colleen B. Rosenblat
Located in Hamburg, DE
middle ages ring 18 carat white gold 1 emerald 14.86 ct Inspired by the elements and shapes of the Middle Ages, the collection is one of the most ...
Emerald, 18k Gold, White Gold
Colleen B. Rosenblat Tourmaline Rhodolite Gold Earrings
By Colleen B. Rosenblat
Located in Hamburg, DE
Two beautiful vibrant colors are mixed up in these 18k white gold earrings. With its perfect length of 22 mm they are wearable every day. The green tourmalines have a weight of 5.4 c...
18k Gold, White Gold
Hammered Gold Bracelet, 18K White and Rose Gold, 6 Cushion-Cut Diamonds 7.43ct
By Colleen B. Rosenblat
Located in Hamburg, DE
The range extends from curved and straight designs to solid and powerful creations. This bracelet is a statement piece, yet appears effortless and contemporary.
Diamond, 18k Gold, Rose Gold, White Gold
Colleen B. Rosenblat Amethyst Rose Gold Cocktail Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
A timeless, glorious and high-class cocktail ring from the “Masterpieces” collection by Colleen B. Rosenblat. A amethyst of that size and colour is very rare.
Amethyst, 18k Gold, Rose Gold
Colleen B. Rosenblat amber sapphire gold earrings
By Colleen B. Rosenblat
Located in Hamburg, DE
Elegant drop earrings with beautiful amber 17.01 ct and at the top are 24 yellow sapphires embedded with a weight of 22.33 ct. The bottom part is detachable and the upper part can be...
Amber, Yellow Sapphire, 18k Gold, 22k Gold, Yellow Gold
Hammered Gold Ring in 18 Carat Hammered White Gold, 1 Smoky Quartz 13.01 Carat
By Colleen B. Rosenblat
Located in Hamburg, DE
In the elegant hammered gold collection, Colleen B. Rosenblat creates a controversial interplay of shapes. Through her bold treatment of high-carat gold and the combination of unusua...
Quartz, 18k Gold, White Gold
63.04 Carat Aquamarine Gold Necklace
By Colleen B. Rosenblat
Located in Hamburg, DE
This marvelous aquamarine 63.04 ct adorns this 18k white gold necklace which is 51.5 cm long. The pendant is 4.2 cm long and 2.8 cm wide. This aquamarine has a very special mirror cu...
Aquamarine, 18k Gold, White Gold
Certified 48.66 Carat Aquamarine White Gold Collier
By Colleen B. Rosenblat
Located in Hamburg, DE
An extraordinary aquamarine 48.66 ct wonderful placed in this beautiful center of a 18 Karat white gold linking chain necklace. An impressive contemporary piece of jewellery that rea...
Aquamarine, 18k Gold, White Gold
Hammered Gold Collier, 18 kt hammered white gold, 51 diamonds 8.87 ct TW/SI
By Colleen B. Rosenblat
Located in Hamburg, DE
An extraordinary high-class hammered white gold necklace with 51 brilliant-cut diamonds 8,87 ct TW/SI. The size of each segment varies between 23 -...
18k Gold, Rhodium, White Gold
Colleen B. Rosenblat Tourmaline White Gold Earrings
By Colleen B. Rosenblat
Located in Hamburg, DE
Studs in 18k white gold with 8 green Tourmalines 11,3 ct. Designed by Colleen B. Rosenblat
Tourmaline, 18k Gold, White Gold
Colleen B. Rosenblat Diamond Gold Earrings
By Colleen B. Rosenblat
Located in Hamburg, DE
These glamorous red carpet earrings are set in 18 carat white gold with various 12,65 ct cognac diamonds.
Brown Diamond, Diamond, 18k Gold, White Gold
Hammered White Gold Diamond Collier Necklace
By Colleen B. Rosenblat
Located in Hamburg, DE
This one of a kind 18 carat hammered white gold necklace has five cognac diamonds 7.67 ct in total, in very bold bezel settings. Worn it is definit...
Diamond, 18k Gold, White Gold
Amethyst, Mandarine Garnet and Emerald Brooch/Pendant
By Colleen B. Rosenblat
Located in Hamburg, DE
Stunning Colleen B. Rosenblat Brooch with one large 26.89 Carat Amethyst and 4 Mandarin Garnets 16.25 Carat and 4 Emeralds 0.66 Carat each. This Brooch is made of 18 Carat blackened ...
Amethyst, Emerald, Garnet, 18k Gold, White Gold
Colleen B. Rosenblat Morganite Sapphire Rose Gold Cocktail Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
This amazing cocktail ring, set in 18k rose gold, comes along with a huge morganite 31,35 ct and a pair of sapphires 2,00 ct on the sides.
Morganite, Sapphire, 18k Gold, Rose Gold
Colleen B. Rosenblat beryl gold ring
By Colleen B. Rosenblat
Located in Hamburg, DE
The beryl has 33.97 ct it sits exposed in the beautiful white gold setting. Designed by Colleen B. Rosenblat. Ring size: 57
Beryl, 18k Gold, White Gold
Precious Basics Earrings, 18 Karat White Gold 16 Cognac Colored Diamonds 9.05 Ct
By Colleen B. Rosenblat
Located in Hamburg, DE
The classic collection for everyday basic and business looks. Elegantly shaped band rings set with unique, coloured gemstones join sophisticated chains and bracelets, whilst the earr...
Diamond, 18k Gold, White Gold
Colleen B. Rosenblat Pink Tourmaline Gold Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
This 18K rose gold ring with a gorgeous pink tourmaline 11.25 ct. is one of a kind
Tourmaline, 18k Gold, Rose Gold
Middle Ages Ring in 18 Carat White Gold with 1 Aquamarine 25.48 Carat
By Colleen B. Rosenblat
Located in Hamburg, DE
Ring in 18 Carat White Gold with 1 Aquamarine of 25.48 ct from the Middle Ages Collection. Inspired by the elements and shapes of the Middle Ages, the collection is one of the most ...
Aquamarine, 18k Gold, White Gold
Scarab Ring in 18 Carat White Gold, 1 Moonstone 24.17 ct, 2 Rhodolites 0.67 ct
By Colleen B. Rosenblat
Located in Hamburg, DE
The most popular and widely recognised collection by Colleen B. Rosenblat. Engraved with the characteristic scarab motif, these colourful gems have been considered as lucky charms si...
Garnet, Moonstone, 18k Gold, White Gold
Colleen B. Rosenblat Ebony Diamond Gold Earrings
By Colleen B. Rosenblat
Located in Hamburg, DE
One of a kind ebony earrings with cognac diamonds set in 18 carat white gold. designed by Colleen B. Rosenblat.
Diamond, 18k Gold, White Gold
Colleen B. Rosenblat Aquamarine Gold Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
This square setting is very modern and enhances the mirrored cut aquamarine 33.4 ct. Designed by Colleen B. Rosenblat. Ring size: 57
Aquamarine, 18k Gold, White Gold
Colleen B. Rosenblat Tanzanite Amethyst Gold Earrings
By Colleen B. Rosenblat
Located in Hamburg, DE
Earrings in 18k white gold with two tanzanite 3.81 ct and two amethyst 15.24 ct. Designed by Colleen B. Rosenblat
Amethyst, Tanzanite, 18k Gold, White Gold
Colleen B. Rosenblat Tourmaline Gold Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
A glorious tourmaline-drop is set in this 18k white gold setting which is designed by Colleen B. Rosenblat.
Tourmaline, 18k Gold, White Gold
Colleen B. Rosenblat Topaz Gold Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
This enormous cocktail ring is set in 18 carat rose gold with a 74,30 ct topaz. This ring is handmade and designed by Colleen B. Rosenblat. Ring size: 59
Topaz, 18k Gold, Rose Gold
Sapphires and Moon Stones White Gold Earrings
By Colleen B. Rosenblat
Located in Hamburg, DE
This exquisite pair of earrings are hand crafted in 18K white gold with 2 sapphires 3.49 ct each and 2 lovely oval moon stones 31.64 ct each and 118 sapphi...
Moonstone, Blue Sapphire, Sapphire, 18k Gold, White Gold
Certified 13.08 Carat Amethyst Precious Basic White Gold Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
This wonderful noble 18kt white gold precious basics ring with amethyst 13.08 ct. This is a statement ring. The ring size is EU 58 and US 8,4.
Amethyst, 18k Gold, White Gold
Certified 56.65 Carat Mandarin Garnet Earrings
By Colleen B. Rosenblat
Located in Hamburg, DE
Earrings in 18 carat blackened white gold with two mandarine garnet 56.65 ct. Designed by Colleen B. Rosenblat.
Garnet, 18k Gold, White Gold, Rhodium
Rosenblat Fashion Bracelet Rose Gold and Diamonds
By Colleen B. Rosenblat
Located in Hamburg, DE
Rosenblat fashion bracelet 18 carat rose gold diamonds 0.44 ct.
Diamond, 18k Gold, Rose Gold
Colleen B. Rosenblat Peridot Aquamarine White Gold Earrings
By Colleen B. Rosenblat
Located in Hamburg, DE
These 18k white gold earrings with two enticing peridots 17.55 ct and two shimmering aquamarine 3.55 ct are from the beautiful pure design by Colleen B. Rosenblat.
Aquamarine, Peridot, 18k Gold, White Gold
Precious Basics Earrings, 18 KT White Gold, 14 Baguette Diamonds 2.25 ct tw/vsi
By Colleen B. Rosenblat
Located in Hamburg, DE
The classic collection for everyday basic and business looks. Elegantly shaped band rings set with unique, coloured gemstones join sophisticated chains and bracelets, whilst the earr...
Diamond, White Gold
Certified 16.46 Carat Citrine Yellow Gold Studs
By Colleen B. Rosenblat
Located in Hamburg, DE
These handmade stud earrings were manufactured in Germany by Colleen B. Rosenblat. 22 karat yellow gold studs with 16.46 carat citrine in excellent quality.
Citrine, 22k Gold, Yellow Gold
Precious Basics Rose Gold Bracelet with Amethysts of 43.13 ct
By Colleen B. Rosenblat
Located in Hamburg, DE
Precious basics bracelet with 5 amethysts of 43.13 ct. set in 18 kt rose gold. This one of a kind piece is handmade in our own workshop in Hamburg, Germany and designed by Colleen B....
Amethyst, 18k Gold, Rose Gold