Rare Diamonds & Gemstones for the Discerning Collector

Beyond bridal and bespoke design, Gemma Club maintains close relationships within the world of rare and collectible diamonds and gemstones. This is Collectors Corner — where private jeweler Elina Bromberg and buyer Daniela Scott source exceptional stones for clients who already know quality when they see it, and for those who trust Gemma Club to find it for them.

Collecting, Not Just Buying 

A rare diamond or gemstone is more than a purchase — it's an addition to a collection built over years, sometimes generations. Gemma Club works with collectors on sourcing stones that meet a specific standard of rarity, color, clarity, and provenance, whether that's a fancy-colored diamond, an untreated sapphire, or a fine emerald.

  • Expertise You Can Rely On

    Elina Bromberg is a GIA Graduate Gemologist and Accredited Jewelry Professional, and buyer Daniela Scott brings over 25 years of personal collecting experience, along with two decades on the board of the Friends of the Uffizi Gallery. Together, their eye for quality is shaped by both formal gemological training and a lifelong immersion in fine art and gemstones.

  • Emerald & Sapphire Sourcing

    Two of the most requested categories within Collectors Corner are emerald and sapphire — stones prized for their color, rarity, and history. Explore our dedicated pages on Emerald (/emerald-jewelry) and Sapphire (/sapphire-jewelry) sourcing to learn more about what we look for in each.

  • A High Jewelry Relationship

    As a High Jewelry expert for BVLGARI, Elina also helps clients source exceptional vintage and modern creations for those who know exactly the caliber of piece they're after. This relationship is available to discuss during a private consultation.

Fancy Diamonds and Rare Cuts 

Beyond white diamonds, Gemma Club sources fancy-colored diamonds and unusual cuts for collectors who want something genuinely uncommon. These stones are evaluated the same way as every other diamond that passes through Gemma Club — personally, by a GIA-trained gemologist, before it's ever presented to a client.

For Every Kind of Collector

Not every collector arrives with decades of experience, and Gemma Club works comfortably with both ends of that spectrum. Newer collectors receive the same private education and guidance as longtime clients, so a first rare stone purchase feels informed rather than intimidating. Longtime collectors, meanwhile, benefit from Elina and Daniela's ability to source specific, hard-to-find stones on request.

Pink oval gemstone ring with gold setting and pink accent stones
Multicolor gemstone cocktail ring with a square green center stone and halo settings on a silver band

A Two-Person Eye

Few jewelers can offer both a formally trained gemologist and a career collector working on the same sourcing decisions. At Gemma Club, Elina's GIA credentials and Daniela's decades of hands-on collecting experience work together, so every stone is judged both technically and by someone who has spent a lifetime around genuinely exceptional pieces — a combination few private jewelers can offer.

Discuss Your Jewelry Project

Looking for a specific stone or building a collection? Book a private consultation to start the conversation.