What Are its Crystal Structure and Chemistry?
Comprised entirely of carbon
Chemical formula is simply C.
Belongs to theisometric or cubic crystal system meaning that
each of the crystallographic axes is the same length and at
What is Beryl and What are its Basic Qualities?
Long and shortwave UV fluorescence can also be observed in beryl
Most commonly ascribed to the presence of trivalent chromium (Cr+3),
which produces a red hue.
The pink variety of beryl
More than 10 carats are exquisite and over 50 carats are usually named
and in the possession of museums, royalty or very wealthy people
Larger than 100 carats are usually not sold and find their way into
Smaller diamonds of
Rubies of the finest quality generally come from Burma, also known as
Pigeon's Blood Red
Colour of the finest stones, a red to purple-red colour with
medium-dark tone that is enhanced by a red fluorescence.
The famous "Mogok Ruby",
Retailer and Industry Organizations
Independent evaluations and training of certified gemologists is an
important part of the diamond and jewellery industry.
An independent evaluation of diamonds is significant because small
differences in the grade of
The Three-fold Rock Classification System
The basic three-fold classification of rocks are igneous, metamorphic,
Illustrating the Rock Cycle.
Partial melting of mantle material forms magma
Extrusive igneous rocks form from magma that