was the key to their success. Why?.
Zircon
It is hard to understand why zircon is not more popular with jewelry makers. Its hardness and fracture are no worse
Jadeite Jade
Jadeite is a precious gem. In its pure form it is white, but it can also occur in a wide range of colours
Sillimanite
For some time, this tough, durable gemstone has been either considered a collector's stone or used industrially (in the
Rhodochrosite
Rhodochrosite is another relative newcomer to the trade, having been on the market only since 1940. It can be
Hemimorphite
Hemimorphite has an unusual characteristic: a change in temperature or pressure induces an electrical charge in the
Appraising Gemstones
When you are first presented with a tray of gemstones it is easy to feel dazzled and slightly overwhelmed, and to
Labradorite
This fascinating and colourful stone, which offers a range of colours and optical effects, has become a firm favourite
