Goshenite (Beryl)

Color: Colorless
Moh’s Hardness: 7.5-8
Refractive Index: 1.57-1.60
Critical Angle: 39.87°
Specific Gravity: 2.65-2.75
Cleavage: None
Fracture: Conchoidal, tough
Dispersion: Medium (.014)
Heat Sensitivity: Slightly
Dichroism: None
Birefringence (double refraction): Weak (.006-.009)
Crystal Structure: Hexagonal

Treatments: None usually...

What I prefer to polishing with: Cerium oxide with a Spectra Ultralap.

Jeff's Comments: Cuts and polishes like any other Beryl, usually no problems... I like to use a 1200 Nu Bond lap for pre-polish, it makes the polishing stage faster and easier. Orientating on the "c" is slightly better. Watch for silk and lilly pad type of inclusions perpendicular to the "c" axis.

Design Notes: About any design will work well... I prefer a deeper design and often cut Barions...

Design Links:
Signature #4 - This is one of my favorite cuts in Beryl
Blue Ice - Designed for very long crystals

Beryl - Index of Beryl Rough
Aquamarine - Zambian
Aquamarine2 - Afghanistan crystals
Aquamarine3 - Huge crystals from Afghanistan
Collector Beryl (unusual colors) - Seafoam Beryl from Brazil
Emerald - Green Beryl form Zambia
Goshenite (clear Beryl) - Gosenite Beryl from Brazil
Helidore - Helidore Beryl (yellow/green) from Afghanistan
Morganite - Pink to pink/peach Beryl
Beryl Parcels - Various parcel

Bargain Links:
Beryl Bargains

Return to Quartz Information Index

E-mail to inquire or order: jeff@faceters.com