Red: Bixbite, only found in one location in Wah Wah Mountains, Utah, USA
Bright yellow: Heliodor. If yellow becomes deep toward orange: "golden Beryl"
Colorless: Goshenite
Deep blue: only found on one location in Brazil: will quickly loose its color if expoed to daylight
Green: too light to be considered emeralds. Problematic as a green beryl is much cheaper than an emerald but sometimes still sold as one
Clarity
Considering the range of beryls clarity can vary from eye-clean to very included
(click on colour to find other gemstones)
TREATMENTS
CUT
Color: Heating can take out a secondary color rendering a deeper, more saturated color
Color: Sometimes colorless beryls are irradiated to produce yellow colours. This colour is considered stable. Maxixe beryl is almost always irradiated is often irradiated in a laboratory. Color is not stable. Some colourless and light pink beryl from Minas Gerais is irradiated to produce maxixe beryl
Clarity: colourless oil and resins are sometimes used to hide fissures in red beryl
Beryls may be cut several different ways, though emerald cut and oval cut gems tend to predominate
Care & Collecting
Beryls are generally quite hardy unless they are strongly includedRed beryls tend to be more like emerald in this respect and may be fragile if the gem has many surface reaching fissures. A dampened, non-abrasive cloth is best used to clean beryl jewelry.
Large beryls with high level of saturation
Rare beryls such as Red beryl
Special effects such as "cat's eye"
Borderline beryls: "is it an emerald or is it a green beryl"
Famous and Influential English Jeweler Edwin Streeter on Sapphires. He led a consortium against Baron Rodthschild for the rights of the Burma Ruby mines.
More on Sapphire. We will add some more themes pertaining to sapphires here. Please bear with us as this is a labour of love, and very very time consuming.
Modern Jeweler has an excellent 4-page review article on Padparadscha Sapphire.
Pala Gems has an amazing article written by Dick Hughes on what constitutes a Sapphire what a Ruby and how colors can confuse you.
A review article of the life of gemologist Robert Crowningshield , the one who wrote the famous 1983 Gem and Gemology Article about Padparadscha Sapphire, and later the 1989 article on the Hope Diamond.