& Diamond Testing
Natural vs. lab-grown screening.
Current value & positioning.
Guidance on documentation.
Complimentary verbal appraisal and diamond testing only. Formal written appraisals and documentation are not included.
Gemological Services of Beverly Hills · Est 1983
Independent review, documentation, valuation, and advisory for private clients, estates, institutions, and significant assets.
Live Market Intelligence
Spot Gold · USD/oz
Intelligence
Loading market analysis…
Trusted By
Private ClientsEstatesCollectorsInstitutionsFamily OfficesGovernment AgenciesTrusted Authority
Clients We Serve

BlackRock

GIA

Diamond Dealers Club NY

Hong Kong Trade Development Council

Cartier

Deloitte & Touche

Neiman Marcus

Harry Winston

Tiffany & Co.

US Mission African Union

BlackRock

GIA

Diamond Dealers Club NY

Hong Kong Trade Development Council

Cartier

Deloitte & Touche

Neiman Marcus

Harry Winston

Tiffany & Co.

US Mission African Union

BlackRock

GIA

Diamond Dealers Club NY

Hong Kong Trade Development Council

Cartier

Deloitte & Touche

Neiman Marcus

Harry Winston

Tiffany & Co.

US Mission African Union
Live Market Intelligence
Spot Gold · USD/oz
Intelligence
Loading market analysis…

Limited Private Client Offer
Receive complimentary ½ carat lab diamond studs when you enroll as a GSBH Private Client member.
Available with qualifying paid services. One pair per household. While supplies last. GSBH verification does not constitute a formal grading report or insurance appraisal unless separately issued.
From valuation and authentication to strategic guidance and bespoke design,
our services are tailored to the needs of collectors who expect excellence.
Formal documentation for insurance, transfer, estate, and legal use.

Confidential introductions and strategic support for buyers and sellers.

Create or transform meaningful jewelry with bespoke design guidance.

Specialized services designed to protect, restore, and grow lasting value.
Multi-Piece Appraisal
COLLECTIONS
Jewelry Repair & Restoration
CARE
Secure Storage
INSURED
Global Market Advisory
MARKET INTELLIGENCE
Acquisition Advisory
PRE-PURCHASE

NOT SURE WHERE TO BEGIN?
Share a few details and we'll recommend the best next step for your goals.
Global Market Presence
GSBH maintains active advisory relationships in the world's six most significant gemstone trading, sourcing, and auction corridors.
Beverly Hills · New York · Las Vegas · Miami
The United States remains the world's largest consumer market for high-value gemstones and jewelry. GSBH's Beverly Hills headquarters positions the firm at the epicenter of West Coast private collector activity, estate liquidations, and auction house pre-sale analysis. Major auction activity across Sotheby's, Christie's, and Bonhams New York creates consistent demand for independent authentication and appraisal.
Advisory Focus
US
United States
Beverly Hills · New York · Las Vegas · Miami
The United States remains the world's largest consumer market for high-value gemstones and jewelry. GSBH's Beverly Hills headquarters positions the firm at the epicenter of West Coast private collector activity, estate liquidations, and auction house pre-sale analysis. Major auction activity across Sotheby's, Christie's, and Bonhams New York creates consistent demand for independent authentication and appraisal.
UAE
UAE & Middle East
Dubai
HK
Hong Kong
Hong Kong
TH
Thailand
Bangkok
AF
Africa
Johannesburg
BR
Brazil
São Paulo
Advisory & Review Services
GSBH helps clients understand the documentation, condition, valuation context, and market positioning of gemstones, jewelry, diamonds, gold, precious metals, and private collections before major decisions. Whether preparing for insurance, estate planning, resale consideration, acquisition review, custody, or transfer, our role is to provide independent review and advisory clarity.
Understand documentation, condition, valuation context, and market readiness before making a resale decision.
Receive independent review and guidance before acquiring gemstones, jewelry, diamonds, gold, or precious metals.
Prepare documentation and item records before custody, inheritance, institutional review, or private transfer.
Organize inherited jewelry, private collections, and precious assets with professional documentation and review.
Support higher-level review, documentation, and transaction-readiness discussions for qualified institutional or international matters.
Gemstones are the oldest citizens of our planet. Born in darkness deep within the earth's crust, they were formed under unimaginable pressure and heat conditions that only nature itself could orchestrate.

Z Boyadjian
CEO & International Gemological Advisor
Debbie C.'s Discovery
When Debbie C. walked through our doors, she expected a straightforward appraisal of a few diamonds she'd had for years—worth maybe $100, she thought. She needed the assessment urgently. Her husband had recently fallen ill, and clarity on their assets felt important during an uncertain time. But during the consultation, she casually mentioned a small box of older family jewelry, tucked away in a drawer and largely forgotten. What began as a routine review became something extraordinary.
Among the pieces was an imperial jade ring—elegant, understated, the kind of treasure that quietly waits in silence. When our specialists examined it, they realized what had been overlooked all those years: this was a significant piece, valued at approximately $200,000. Debbie's assumption of costume jewelry turned into a discovery of genuine legacy.
We visited her home to document the pieces properly. Sitting in her living room, surrounded by generations of family memory, Debbie shared the story of where the ring had come from. Her grandmother had worn it decades ago. It had passed through hands quietly, without ceremony, the way truly meaningful things often do. As we photographed it under proper lighting, the jade revealed its true color—a rich, translucent green that no casual glance in a drawer could ever capture.
It wasn't just about the dollars revealed. It was about understanding what her family had been holding onto all along—and why.
What She Thought
$100
What It Was Really Worth
$200,000
A proper private review does more than assign value. It can clarify what a family has been preserving all along.


"The most important item in a collection is not always the one brought to the front of the table. It is the one that has been sitting quietly in the family for years."
Recent announcements, research publications, and institutional developments.
In the jewelry world, provenance is one of the most overlooked elements in determining value. Many appraisers focus only on visible beauty or technical grading, yet provenance — the story and integrity of a piece — is what ultimately defines its worth.
Beverly Hills, CA — Authenticity has become the cornerstone of trust in business. Z. Boyadjian, renowned gemologist and founder of Gems Are Forever Inc., emphasizes why provenance and experience matter in jewelry appraisal.
In today's luxury market, authenticity is the cornerstone of trust. Yet in an era of digital transactions, the line between genuine and imitation has grown increasingly blurred. A skilled appraiser must possess technical expertise and deep historical knowledge.
Provenance is one of the most misunderstood aspects of jewelry appraisal. It goes far beyond a name or a story — it is the fingerprint of authenticity that connects a jewel to its time, its maker, and its legacy.
In an age of rapid transactions and global trade, authenticity has become the cornerstone of trust. A major Louvre heist illustrates the profound difference between intrinsic value and provenance value — and why an experienced gemologist matters.
In periods marked by geopolitical tension, uneven liquidity, and renewed scrutiny of traditional financial institutions, tangible hard assets are re-entering serious conversation.
The highest tier of the Kashmir sapphire market is no longer defined by origin alone, but by the convergence of beauty, treatment status, and documentation quality.
In the emerald market, origin confidence, treatment disclosure, and supporting documentation increasingly travel together with value.
As markets become more visibly repriced and ownership structures more scrutinized, tangible hard assets are being revisited for their discretion, portability, and non-digital character.
Schedule a private consultation and get the clarity and confidence you deserve.