Glass | Gemopedia

Glass has been used for thousands of years as a decoration. It is sometimes employed as a gemstone simulant, but is often appreciated entirely upon its own merits, especially when formed with a high level of artistry.
Alternate
Names
Paste, Strass, Faience
Colors
All Colors

Glass Classification

Common Name

Glass

Species

NA

Variety

Colors

All Colors

Alternate Names

Paste, Strass, Faience

Gemstone Groups

Key Separations

RI, magnification and warm to touch.

Comments

Glass Optical Properties

Transparency

Transparent - Opaque

Refractive Index

1.47-1.7
Tolerance:can go OTL

Birefringence

Optic Character

NA

Optic Sign

NA

Polariscope Reaction

Aggregate (AGG)

Fluorescence

SWUV: Variable
LWUV: Variable

CCF Reaction

Pleochroism

None

Dispersion

Strength: moderate if contains lead Value: 0.00901

Comments

Glass Chemistry & Crystallography

Chemical Name

silica

Chemical Formula

Synthesis

Crystal System

NA

Classification

Nature

Simulant

Crystallinity

Non-Crystalline

Comments

Glass Characteristic Physical Properties

Hardness

5-6

Streak

Specific Gravity

2.3-4.5

Toughness

Poor

Inclusions

Since glass has a low mohs hardness and is usually molded the stones will have mold marks, rounded facet edges, concave facets. It will also sometimes show orange peel effect or a bumpy surface that resembles an orange peel. Glass will often show cavities on the surface of the stone and swirl lines and glass bubbles internally.

Luster

Vitreous

Stability

Fracture

Conchoidal, Granular, Splintery

Cleavage

None

Comments

JTV on Google+
0 Items
My Wish List
Close
Item
Description
Qty.
Price


Estimated Order Total:
0
Total Due Today:
0
Close
Item
Description
Qty.
Price


Page of 1