was the key to their success. Why?.
Kyanite
Nearly all gemstones have a single hardness value, no matter where it is measured on the crystal.
Appraising Gemstones
When you are first presented with a tray of gemstones it is easy to feel dazzled and slightly overwhelmed, and to
Faceted Square Cuts
The second group of faceted cuts includes straight-sided girdle shapes: squares, rectangles, octagons, triangles,
Green moonstone
Green moonstone is not as well known as rainbow or blue moonstone as it doesn't have the colour play, but it is still a
Sugilite
Despite the fact that sugilite has been in production for a relatively short period, there are already reports that it
Opal Matrix
ome opals have a banded growth of precious opal with matrix rock, and there can also be inclusions of matrix within the
Shell
You can saw it, file it, carve it, drill it and engrave it: shell is one of the easiest of materials to work with.