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
Peridot (also olivin or Chrysolite)
When peridot is good, it is very good, but when it is bad ... There is so much pale and lacklustre material around it
Diopside
Diopside is not really a name to attract the jewelry-buying public and it doesn't invoke the reality of this vibrant
Pearls produced by snails
pearls can form in sea snails and are extremely rare
Ruby
Ruby is corundum that has a purplish- bluish red to yellow-red colour. The finest colour is pure red with a hint of
Sillimanite
For some time, this tough, durable gemstone has been either considered a collector's stone or used industrially (in the
Orthoclase Feldspar
Orthoclase is a moderately cheap transparent stone that is colourless or pale yellow and can have a bluish white