Identifying Gem Stones – Step 6:

Color:

While this may seem the first test to use when classifying a gem stone, using color to identify a stone is not as reliable as you might think.

Most people view the sapphire as blue, but this cousin to the ruby can be found in various shades including pink, green, yellow and almost transparent. The classic diamond, with its colorless crystal, looks so much like the less rare cubic zirconium or cubic zirconia, that they almost indistinguishable without a close examination.

Identifying Gem Stones – Step 7:

Chemical and Physical tests:

These methods of identification of gems most often used by experts because they usually require special equipments. The tests include:

Specific gravity.

Refractive Index.

Light Dispersion.

Color changes.