Universal Gemological Laboratory · Babylon, NY
Know what it’s really worth.
A full-service independent jewelry appraisal company. We identify, appraise, and evaluate gemstones and jewelry — for the trade and the public — and we never buy or sell, so the only thing we offer is the truth.
- GIA Graduate Gemologists
- Accepted by major insurers
- Appraised in front of you
0 tons
of ore mined to yield a single one-carat rough diamond
0 facets
on most cut diamonds — each one graded under 10× magnification
0 points
in every carat — and every point counts on the report
D–Z
the full color scale our gemologists grade against, stone by stone
What we do
Every service, fully independent.
From a single engagement ring to a wholesaler’s entire parcel — identified, graded, and valued by GIA graduate gemologists.
Independent Appraisals
Performed for the consumer in front of you, while you watch. Nothing leaves your sight.
Pre-Purchase Evaluation
Confirm what you are about to buy is exactly what the seller says it is — before money moves.
Post-Purchase Confirmation
Already bought it? Bring it in and know for certain what you took home.
Insurance Appraisals
Detailed reports accepted by all major insurance companies.
Diamond Certification
Full grading with plotted inclusion mapping, on the GIA scale.
Colored Stone ID
Identification and appraisal of rubies, sapphires, emeralds and more.
Estate & Tax Appraisals
Liquidation and tax appraisal services for estates and trusts.
Mini-Reports for the Trade
Credit-card-sized reports made to sit in a jewelry showcase.
in front of you
The UGL difference
Your jewelry never leaves your sight.
When we perform an appraisal for the consumer, it is done in front of you while you watch. You see the loupe, the scale, the light — and exactly how your piece earns its grade.
Because we do not buy or sell jewelry and never charge a percentage of value, there is no thumb on the scale. Just an expert, unbiased opinion you can take to any insurer, buyer, or court.
- Graduate Gemologist (GIA) on every appraisal
- Accepted by all major insurance companies
- Flat fees — never a percentage of value
Trusted across the trade
Who relies on UGL.
- Banks
- Diamond Wholesalers
- Online Sellers
- Retail Stores
- TV Jewelry Sellers
- Estate Attorneys
- Insurance Companies
- The Retail Public
Diamond education
Learn the Four C’s before you spend a dime.
Cut, color, clarity, carat weight — we explain how each is measured and how each moves the price, in plain English.
Read all testimonials“When it comes to estate jewelry, there is no other laboratory that we trust more.”
— Afshin M., Khordipour Jewelry
By appointment · Babylon, NY
Know exactly what you have.
Appraisals are performed in front of you, by appointment, by GIA graduate gemologists. One call books it.