Verbal Appraisal — An informal market value discussion. Does not replace a written appraisal, insurance appraisal, legal valuation, or formal documentation.
Diamond Testing — Preliminary screening only. Does not constitute a formal grading report, insurance appraisal, or laboratory certification.
Consultations & Appraisals
Diamond Testing & Authentication
Repair, Restoration & Design
Storage & Security
How Pricing Works
Verbal appraisal fee waived through August 31, 2026 for any ZIP code entered during booking. Standard fee is $50.
Diamond testing is complimentary through June 30, 2026 for qualifying appointments.
Written appraisals are $100 per item. All fees confirmed before work begins.
Collection reviews, estate engagements, and advisory retainers are priced based on scope, item quantity, and complexity.
Third-party laboratory coordination — including GIA submissions, origin testing, and specialty verification — is quoted separately.
Consignment and private sale advisory is available. Commission rates range from 15% to 22% based on transaction value.
Consignment & Private Sale
GSBH provides private review and strategic guidance for consignment, estate liquidation, and private sale opportunities. Consultation and appraisal fees may be credited for qualifying consignments accepted through GSBH.
Book Complimentary AppraisalCommission
Complex Items & Collections
For important colored gemstones, origin-sensitive pieces, high-value estate collections, and institutional advisory engagements, GSBH provides bespoke scope and custom pricing. All engagements begin with a complimentary verbal appraisal.
Custom scope may include
Frequently Asked