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.
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
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
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
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
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
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
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
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 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
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
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 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
Cocktail Ring in 18 Carat White Gold, 1 Kunzite of 27.48 ct, 2 Sapphires 3.39 ct
By Colleen B. Rosenblat
Located in Hamburg, DE
A ring in 18k white gold with one kunzite 27.48 ct and two beautiful orange sapphires 3.39 ct. Ring size: 58 Designed by Colleen B. Rosenblat.
Kunzite, Sapphire, 18k 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
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 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
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
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
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
Colleen B. Rosenblat Green Tourmaline Gold Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
This Ring,set in 18k white gold, captivates with a garden green tourmaline 12.14 ct. It is designed by Colleen B. Rosenblat.
Tourmaline, 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
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
Certified 7.03 Carat Smoky Quartz Cocktail Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
This beautiful 18 carat white gold ring with smoky quartz 7.03 ct is just a statement. The ring size is EU 56 and US 7.6.
Quartz, 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
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
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
Rosenblat Ring in 18 Carat White Gold, 44 Cognac Colored Diamonds 0.29 Carat
By Colleen B. Rosenblat
Located in Hamburg, DE
The interpretation of the name ‘Rosenblat’ in the designer’s logo is a stylised rose petal. Whether as a lustrous pendant, the clasp on a necklace, earrings or a bracelet, the Rosen...
Diamond, Brown Diamond, 18k Gold, White Gold
Colleen B. Rosenblat Keshi Pearl Diamond Gold Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
The ring in 18k white gold, diamonds 1,59 ct. and a grey-pink keshi pearl is definitley an eye - cather.
Diamond, Pearl, 18k Gold, White Gold
Price Upon Request
Colleen B. Rosenblat Mandarin Garnet Pave Sapphire Blackened Gold Ring
By Colleen B. Rosenblat
Located in Hamburg, DE
This spectacular Cocktail ring, is set in 18k blackened white gold paved with 412 intense orange Sapphires 9.1 ct and a magnificiant mandarine garnet 26.0 ct in the front. It is desi...
Garnet, Sapphire, 18k Gold, White Gold
Steven Battelle 47.2 Carat Orange-Pink Tourmaline Diamonds 22K Gold Ring
By Steven Battelle
Located in Soquel, CA
A bright and extremely lively orange-pink oval cabochon of Brazilian Minas Gerais tourmaline, 20 x 22 mm in size is the centerpiece of this beautiful showstopper high-carat gold ring...
Diamond, Tourmaline, 22k Gold
14K Yellow Gold Oval Green Tourmaline Ring
Located in Trumbull, CT
Natural oval green 7 mm X 9 mm Tourmaline approximately weighs 2.35 carat. Hand cut and polished. Stone is clean with no inclusion.
Tourmaline, 14k Gold, Yellow Gold
Pink Sapphire and Rose Quartz Ring
Located in Palm Beach, FL
18KT GOLD, PINK SAPPHIRE AND ROSE QUARTZ RING Rose Quarts approx. 21.28 carats, Pink Sapphires approx. 5.32 carats size 6
Quartz, Pink Sapphire
2.51 Carat Tourmaline Sapphire Diamond Rose Gold Cocktail Ring
By Roshe Jewels
Located in Los Angeles, CA
2.51 Carat Tourmaline Sapphire Diamond 14 Karat Rose Gold Cocktail Ring Affordable! Luxury! Fine jewelry! Fashion! This Ring has a Cushion Checkered Cut Tourmaline that weighs 1.71 ...
Diamond, Sapphire, Pink Sapphire, Yellow Sapphire, Tourmaline, Blue Sapp...
Steven Battelle 16.8 Carat Cabochon Pink Tourmaline 18K Gold Ring
By Steven Battelle
Located in Soquel, CA
A high-grade almost flawless deep pink Mozambique pink tourmaline 13 x 18 mm cabochon is held in a spiral carved and fluted 4 prong setting atop a substantial split double spiral mot...
Tourmaline, 18k Gold
Ring in Rose Gold with 1 Mandarine Garnet and Diamonds.
By Thomas Leyser
Located in Idar-Oberstein, DE
Thomas Leyser is renowned for his contemporary jewellery designs utilizing fine coloured gemstones and diamonds. This ring in 18k rose gold is set with a 1x fine Mandarin Garnet (f...
Diamond, Garnet, 18k Gold, Rose Gold
Claris-A 17.67ct Unheated Ceylon Sapphire Diamond Ring in 18K Gold
By Claris-A
Located in Monte Carlo, MC
Offered by Claris-A, this exquisite cocktail ring showcases at its center a natural, unheated sapphire from Ceylon, weighing 17.67 carats. Its unique octagonal, emerald cut is rare f...
Diamond, Emerald, Sapphire, 18k Gold, White Gold
Ring Rose Gold with 1 Mandarine Garnet Cabouchon and Mandarine Garnet Pavé
By Thomas Leyser
Located in Idar-Oberstein, DE
This 18k rose gold (23.20g) ring is set with 1x fine Mandarin Garnet Cabouchon (oval, 14.5x13.5mm, 18.47cts). + 72x Mandarin Garnets (facetted, round, 2-3mm, 5.97cts). Ringsize: 6 ...
Garnet, Mandarin Garnet, 18k Gold, Rose Gold
Onyx and Pink Tourmaline 18K Gold Dome Ring with Diamonds
Located in Monte Carlo, MC
This ring, offered by Claris-A, features carved black onyx forming a smooth, sculptural frame, its deep polished surface creating a bold contrast against two pear-shaped pink tourmal...
Onyx, Tourmaline, White Diamond, Diamond, 18k Gold, Yellow Gold, Gold
Georgios Collections 18 Karat Rose Gold Pink Tourmaline and Enamel Diamond Ring
By Georgios Collections Inc
Located in Astoria, NY
We present you this new color variation of this popular ring from S.Georgios designer with white Enamel, Pink Tourmaline, and Diamonds in 18 Karat Rose Gold. This stunning piece feat...
Diamond, White Diamond, Star Sapphire, Tourmaline, Gold, 18k Gold, Rose ...
Colorful Drop Ring 18Kt White Gold with Red Tourmaline Pink Saphires and Diamond
By Nicofilimon the Jewelry Designer
Located in Athens, GR
Beautiful and stylish ring in 18Kt gold. Red Tourmaline meets the pink sapphires and with the diamonds between them, make a colorful combination, that enhances your outfit. This ring...
Diamond, Pink Sapphire, Tourmaline, White Gold, 18k Gold, Rose Gold, Yel...
Aquamarine Diamonds Sapphires 18 Karat White Gold Cocktail Ring
By SCALA GIOIELLI
Located in Marcianise, IT
For any problems related to some materials contained in the items that do not allow shipping and require specific documents that require a particular period, please contact the selle...
Aquamarine, Diamond, Sapphire, 18k Gold, White Gold
Scarab Ring, 18k White Gold, Rose Quartz and Tourmalines
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...
Quartz, Tourmaline, 18k Gold, White Gold
Scarab Ring, 18k White Gold, Tourmaline and Tourmalines
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...
Tourmaline, 18k Gold, White Gold
Scarab Ring, Aquamarine and Tourmalines
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...
Aquamarine, Tourmaline, 18k Gold, Rose Gold
Hammered Gold Ring in 18 K Hammered White Gold, Zircon 9.60 Ct
By Colleen B. Rosenblat
Located in Hamburg, DE
Modern antiquity! 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 c...
Zircon, White Gold
Scarab Ring, 18 K White Gold, Moonstone 26.91 Ct, Champagne Diamonds 0.51 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...
Diamond, Moonstone, 18k Gold, White Gold
Precious Basics Ring 18 Karat White Gold 2 Tourmalines 4.84 Carat and 1.30 Carat
By Colleen B. Rosenblat
Located in Hamburg, DE
From the classic collection for everyday basic and business looks. Elegantly shaped band rings set with unique, coloured gemstones join architectural forms. Ring Size 8.5 (EU 58)
Tourmaline, 18k Gold, White Gold
Scarab Ring, 18K White Gold, Moonstone 17.34 Carat, Mandarin Garnets 0.80 Carat
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
Cocktail Ring, 18 Karat Rose Gold, Morganite 20.33 Carat, Diamonds 0.90 Carat
By Colleen B. Rosenblat
Located in Hamburg, DE
Cocktail Ring 18 Carat Rose Gold 1 Morganite 20.33 ct 86 Cognac Coloured Diamonds 0.90 ct The light reflected by the facets of the gemstones and the metal surface not only capture t...
Diamond, Morganite, 18k Gold, Rose Gold
Scarab Ring, 18K Yellow Gold, Coral 31.76 Carat, Paraiba Tourmalines 0.29 Carat
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...
Coral, Tourmaline, 18k Gold, Yellow Gold
Scarab Ring, 18 Karat White Gold, 1 Onyx 22.40 Carat 2 Diamonds 0.49 Carat tw/si
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...
Diamond, Onyx, 18k Gold, White Gold
Precious Basics Ring in 18 Carat Yellow Gold, 6 Emeralds 1.05 Carat
By Colleen B. Rosenblat
Located in Hamburg, DE
A touch of the exquisite for everyday life! The classic collection for everyday basic and business looks. Elegantly shaped band rings set with unique, coloured gemstones join sophis...
Emerald, 18k Gold, Yellow Gold
Scarab Ring in 18 Carat White Gold Set with 91 Diamonds 0.88 Carat Tw/Si
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...
Diamond, 18k Gold, White Gold