Bead & Button – October 2019

FacetJewelry.com/BeadAndButton 61

6

X-RAY FLUORESCENCE

TEST

This test requires an x-ray fluo-

rescence instrument, which is

used to analyze the metal content

by assay offices, refiners, pawn-

brokers, and other dealers who

buy and sell precious metals.

It indicates all the metals in

an object and their percentages.

If you are in the market for

this analyzer, expect a price tag

around $18,000!

POTASSIUM DICHROMATE

SOLUTION TEST

Sterling silver can be detected by placing

a drop of potassium dichromate and

nitric acid solution on the test metal

surface. Jewelry supply stores sell it

in small bottles under the

name of “Silver Testing

Solution” for about $5–$10

a bottle. The liquid turns

bright red and leaves a red

stain on a white paper towel

when it comes in contact

with sterling silver. After it

dries, it may look gray. B&B

5

Renée Newman, GG, BA, MA is a gemologist,

lecturer, and author of jewelry and gem books.

Her books are used worldwide as sales-training

tools and references for jewelers, dealers, and

appraisers. Look for them on FacetJewelry.com.

Ph

ot

o (^) b
y (^) R
en
ée
(^) N
ew
ma
n