GSBH INDEX1,842pts▲ +1.3%GOLD$4,392.52/oz▲ +75.76 (1.76%)SILVER$65.46/oz▲ +1.17 (1.82%)AUCTION SIGNALActiveCOLLECTOR DEMANDStrongRisingESTATE ACTIVITYElevatedActiveCOLLECTOR SENTIMENTPositive↑GSBH INDEX1,842pts▲ +1.3%GOLD$4,392.52/oz▲ +75.76 (1.76%)SILVER$65.46/oz▲ +1.17 (1.82%)AUCTION SIGNALActiveCOLLECTOR DEMANDStrongRisingESTATE ACTIVITYElevatedActiveCOLLECTOR SENTIMENTPositive↑
GSBH INDEX1,842pts▲ +1.3%GOLD$4,392.52/oz▲ +75.76 (1.76%)SILVER$65.46/oz▲ +1.17 (1.82%)PLATINUM$1,816.30/oz▲ +19.20 (1.07%)NATURAL 1CT D-VVS1See GSBH BenchmarkCOLORED STONE WATCHElevatedAUCTION SIGNALActiveGSBH INDEX1,842pts▲ +1.3%GOLD$4,392.52/oz▲ +75.76 (1.76%)SILVER$65.46/oz▲ +1.17 (1.82%)PLATINUM$1,816.30/oz▲ +19.20 (1.07%)NATURAL 1CT D-VVS1See GSBH BenchmarkCOLORED STONE WATCHElevatedAUCTION SIGNALActive
Leadership
GSBH is led by internationally recognized gemological experts with deep expertise in scientific analysis, valuation, and institutional advisory.
Zareh "Z" Boyadjian
Founder & CEO
Z Boyadjian established GSBH in 1983 as an independent gemological authority serving collectors, estates, and institutions in Southern California and internationally.
With over four decades of experience, Z has built a reputation for scientific rigor, ethical independence, and discretion in handling rare gemstone assets for private clients, family offices, and legal proceedings.
Professional Credentials
- Graduate Gemologist (G.G.), Gemological Institute of America
- Accredited Senior Appraiser (ASA), American Society of Appraisers
- 40+ years in gemological services and luxury estate advisory
- Expert witness testimony in gemstone-related litigation
- Published researcher in gemstone authentication methodologies