Ecert ™
Document of Establishment
Insurance Appraisals • Gem Identification • Jewelry & Watch Evaluation • Acquisition Consulting
Our Services
Insurance Appraisals
Professional documentation for insurance coverage and claims. Accurate, defensible valuations prepared to meet the requirements of leading insurers.
Gem Identification
Scientific identification and evaluation of gemstones and minerals. Precise analysis using professional gemological instruments and methodology.
Jewelry Appraisals
Fine jewelry valuations for insurance, estate planning, resale, and personal records. Thorough assessments conducted with complete independence.
Luxury Watches
Authentication and valuation of collectible and luxury watches. Expert evaluation for insurance, estate, and acquisition purposes.
Acquisition Consulting
Independent guidance for purchasing exceptional gemstones and jewelry. Unbiased counsel free from retail affiliations or sales incentives.
Vintage Instruments
Evaluation and acquisition consulting for collectors and musicians. Specialized expertise in vintage and collectible musical instruments.
Featured Collection
Fine Jewelry & Gemstones
From diamond solitaires to sapphire-set heirlooms, our curated collection reflects decades of connoisseurship. Each piece is selected for its craftsmanship, provenance, and enduring value.
Explore the GalleryAppraisal & Acquisition
Vintage Instruments
Beyond gemstones and jewelry, GEM DATA provides expert appraisal and acquisition consulting for collectible vintage instruments — from rare archtop guitars of historical significance to more contemporary instruments.
Whether you are insuring a prized collection, settling an estate, or seeking to acquire a specific instrument, our independent expertise ensures an accurate, unbiased valuation.
Explore the Gallery
Meet the Gemologist
JHoney Jacinto Ramos-Ballejo
Graduate Gemologist
With decades of experience in gemological science and appraisal, JHoney Jacinto Ramos-Ballejo brings unmatched expertise and unwavering independence to every evaluation. As a Graduate Gemologist of America, she provides fully unbiased assessments — free from retail affiliations or conflicts of interest. Every appointment is personal, thorough, and conducted with the highest standards of professional integrity.
Visit Our Union Square Office
Located inside the historic Shreve Building in the heart of downtown San Francisco, our appointment-only office offers a private, professional setting for every consultation.
Address
210 Post St. Ste. 1012, San Francisco, CA 94108
Hours
By Appointment Only
Parking available at nearby Union Square Garage. Accessible via BART (Powell St. Station) and Muni.
What Our Clients Say
"Professional, knowledgeable, and incredibly thorough."
— Insurance Client, San Francisco
"I've trusted GEM DATA with my most valuable pieces for years. There is simply no one better."
— Private Collector
"An independent appraisal from Honey gave me complete confidence in my purchase."
— Jewelry Investor
Schedule a Private Consultation
Professional appraisals by appointment in San Francisco.
Office
210 Post St. Ste. 1012
San Francisco, CA 94108
Hours
By Appointment Only
Phone
415.981.4367