Beryl

By admin | No Comments

Refractive Index : 1.577 – 1.583 (+0.017 – 0.017)

Optical Characteristic : DR, Uniaxial negative

Specific Gravity : 2.72 (+0.18 – 0.05)

Formula : Be3AI2Si6O18

Crystal System : Hexagonal

Variety/Species : Beryl

Species/Group : Beryl

Birefringence : 0.005 – 0.009

Dispersion : .014

Hardness : 7.5 to 8

Toughness : Good

Ultrasonic : Risky

Steam : Risky

UV Long :

UV Short : Inert

Pleochroism : Colorless beryl – Inert to weak yellow and yellow, or different tones of yellow.Heliodore (Yellow Beryl)- Inert.Morganite and Red Beryl - Weak to Moderate, usually light red and purple-redGreen Beryl - Weak to Moderate, bluish green and green, or different tones of green.Maxixe – Weak to moderate, blue and light blue ( darker color associated with optic axis direction )

Strength : Weak

Pleochroism Colors : None.

Heat : Avoid heating

Acids : Avoid hydrofluoric acid

Light : Some may fade

Polish Luster : Vitreous

Fracture : Conchoidal

Fracture Luster : Vitreous to resinous

Clarity Type :

Tones :

Saturations :

Cause of Color : Iron, manganese, chromium or vanadium

Enhancements :

Cleavage : Indistinct

Color Range : Colorless, white (Goshenite),green, olive green, light green, deep green (emerald),greenish yellow Yellow (Heliodor),red (Bixbite)Blue-green, green-blue, blue (Aquamarine)pink, peachy pink (Morganite),pinkish orange, many other colors- See individual varieties.

Transparency : Translucent to opaque

Phenomena : None

Separations : Beryl from-

Identifying Characteristics and information
Tubular or liquid 2-phase inclusions.
Growth tubes.

Spectral Data
See individual varieties( aquamarine, emerald, Red Beryl etc).

Trade Names and Misnomers
Aquamarine (S)
Bezzite
Beryl
Cat’s Eye Beryl (S)
Emerald (S)
Golden Beryl (S)
Goshenite (S)
Green Beryl (S)
Heliodor (S)
Maxixe (S)
Morganite (S)
Red Beryl
Riesling Beryl
Star Beryl(s)
Trapiche Emerald(s)

Tags: Aquamarine, Bezzite Beryl, Cat's Eye Beryl, Emerald, Golden Beryl, Goshenite, Green Beryl, Heliodor, Maxixe, Morganite, Red Beryl, Riesling Beryl, Star Beryl, Trapiche Emerald