Appraisal Process

Yantz Bradbury Associates has an office in Rockville, Maryland near the Shady Grove Metro station.  For collection of 11 or more items we bring the latest in portable equipment to your doorstep. We use a professionally constructed laboratory containing a stereo zoom microscope with dark field illumination accented with a fiber optic light source. Included in the lab is a refractometer, polariscope, long wave and short wave UV light source, Chelsea filter and a Tanita digital gram scale.

We use the Ott-Lite Trucolor lamp for colour grading of diamonds with a 10 stone, Ellin CZ master set. For measuring, we use a Presidium Digital Gemstone Gauge accompanied by the GIA Table Gauge. Metal testing is done with acids.

For photography, we proudly use the Nikon Coolpix 4500 digital camera. This camera also has an adaptor lens for shooting internal photos through the microscope of your gemstones for verifying and illustrating the clarity aspect of your stones.

A state-of-the-art appraisal software is used for compiling the data and recording conclusions. This software allows for digital photos to be included in all documents.

Frequently Asked Questions

Yantz Bradbury Associates
P.O. Box 10123 –  Rockville, Maryland – 20850  
Office: (301) 335-6687

Serving MD, VA and DC Metro Area

Comments are closed.