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.
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
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
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
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
$2,000Sale Price|20% Off
5.2 Carat Green Tourmaline & .15 Carat Diamond Cocktail Ring 14 Karat White Gold
Located in New York, NY
5.2 Carat Emerald cut Green Tourmaline & 0.15 Carat Diamond Cocktail Ring 14 Karat White Gold Estate This spectacular Cocktail ring consisting of a single Emerald cut Green ...
Diamond, Tourmaline, White Gold, 14k Gold
Alex Jona 9.9 Carat Tanzanite White Diamond Gold Solitaire Cocktail Ring
By Alex Jona
Located in Lugano, TI
Alex Jona one-of-a-kind collection, hand crafted in Italy, 18 karat white gold solitaire ring, centering a 9.92 carat square cut Tanzanite, embraced on both sides by two rows of whit...
Tanzanite, White Diamond, 18k Gold, White Gold, Gold
$5,591Sale Price|22% Off
LEYSER 18k White Gold Santa Maria Aquamarine Diamond Ring
By Thomas Leyser
Located in Idar-Oberstein, DE
18k White Gold Ring, set with: 1x Fine Aquamarine (fac., radiant-cut, Santa Maria, 9,5mm, 3,28 carat), 6x Diamonds (brilliant-cut, 2mm, TW/vsi, 0.20ct) 20x Diamonds (brilliant-cu...
Aquamarine, Diamond, 18k Gold, White Gold
Natural 13 Carat Emerald Cut Zambian Emerald & Diamond Ring in 14kt White Gold
Located in New York, NY
Natural 13 Carat Emerald Cut Zambian Emerald & Diamond Ring in 14Kt White Gold A classic design ring , Ring Size 6.75 Exact 13 Carat Emerald Cut Em...
Diamond, Emerald, 14k Gold, White Gold
18 Carat White Gold and Aquamarine Ring
Located in Amsterdam, NL
An 18 carat white gold solitaire ring set with a step cut aquamarine in flawless condition and quality (circa 14 carat), France, marked with a French aigle and half a illegible Frenc...
Aquamarine, 18k Gold, White Gold
Vintage 18 Carat White Gold Aquamarine and Diamond Ring
Located in Chipping Campden, GB
An exquisite vintage ring centrally set with a stunning emerald cut aquamarine measuring approximately 1 carat. Elegantly flanking the aquamarine are two beautiful baguette cut diamo...
Aquamarine, Diamond, 18k Gold, White Gold
Chaumet Paris Liens Smoky Quartz 18k White Gold Large Cocktail Dress Ring French
By Chaumet
Located in Lisbon, PT
Chaumet Paris “Liens” smoky quartz large cocktail or dress ring in 18K white gold, French, 2010s. This now discontinued Lien jewel by Chaumet is bezel-set to the center with a large ...
Quartz, Gold, 18k Gold, White Gold
$4,180Sale Price / item|20% Off
Statement 5.6 Carat Aquamarine Men's Ring with Diamonds in 18K White Gold
By VR Jewels
Located in New York, NY
Statement 5.6 Carat Aquamarine Men's Ring with Diamonds in 18K Gold featuring natural aquamarine of 5.6 carats and diamonds of 0.6 carat. The gorgeous handcrafted ring goes with ever...
Aquamarine, Diamond, Gold, 18k Gold, White Gold
12.05 Carat Natural London Blue Topaz and Diamond 14 Karat Solid White Gold Ring
Located in Los Angeles, CA
12.05 Carats Impressive Natural London Blue Topaz and Diamond 14K Solid White Gold Ring Total Natural Oval Topaz Weight is Approx. 11.00 Carats Topaz Measures: Approx. 16.00 x 12.0...
Diamond, Topaz, Blue Topaz, 14k Gold, White Gold
Vintage Aquamarine and Diamond 18 Carat Gold Solitaire Ring
Located in Chipping Campden, GB
Set in a simple setting modelled in platinum this aquamarine stone measures 1ct. Either side of the stone are diamonds which total 30pts. The ring is modelled in 18ct gold. Fully hal...
Aquamarine, Diamond, Gold
Vintage Aquamarine and Diamond 18 Carat Gold Solitaire Ring
Located in Chipping Campden, GB
Set in a simple setting modelled in 18carat gold this aquamarine stone measures 1.1ct. Either side of the stone are diamonds which total 30pts. The ring is modelled in 18ct gold and ...
Aquamarine, Diamond, Gold
Oval cut Aquamarine in Love Knot Style Ring in 18ct White Gold
Located in Brisbane, AU
Bold colour, subtle curves and sculptural form. The love knot is a modern take on an ancient symbol of eternal love once favoured among European aristocrats. Stack your rings to elevate your style and express your heart. Carving out a space in the binary world of love, the love knot once a symbol of eternal affection in Ancient Rome and among aristocratic, our modern take is designed to declare your love in your own way. Stack the the love knot to capture your style and the subtle nuances of your heart. Representing time past, present, and future. 10 x 8mm oval cut aquamarine (light blue) set in Love Knot style...
Aquamarine, 18k Gold, White Gold
Precious Basics Ring 18 Carat Rose Gold, 1 African Paraiba Tourmaline 2.43 Carat
By Colleen B. Rosenblat
Located in Hamburg, DE
Vivid turquoise and extremely rare African paraiba tourmaline in a beautiful and very comfortable setting in 18 carat rose gold dedicated to...
Tourmaline, 18k Gold, Rose Gold
Precious Basics Ring in 18 Carat Rose Gold Set with 1 Amethyst of 12.24 Carat
By Colleen B. Rosenblat
Located in Hamburg, DE
Precious Basics Ring in 18 Carat Rose Gold set with 1 Amethyst of 12.24 ct Size 55 (7.2/7 US)
Amethyst, 18k Gold, Rose Gold
Precious Basics Ring 18 Carat White Gold 1 Madeira Citrine 9.17 Carat
By Colleen B. Rosenblat
Located in Hamburg, DE
Ring from the Precious Basics Collection in 18 Carat White Gold with 1 Madeira Citrine 9.17 ct Size EU 57 (US 8)
Citrine, 18k Gold, White Gold