Moissanite (Synthetic) | Gemopedia

Synthetic moissanite is an incredibly durable gem. In fact, the ceramic version of synthetic moissanite, called synthetic silicon carbide, is so hard and tough that it is used for body armor and mirrors in orbiting space telescopes! Fortunately, it also makes a gorgeous gem. Synthetic moissanite has a higher dispersion value (fire) than diamond, making it an impressive jewel. Each lab created gem is faceted by a skilled cutter to maximize its brilliance and enhance its exceptional fire. Second in hardness only to diamond, it is extremely resistant to scratching, abrasion, breaking and chipping.
Alternate
Names
Synthetic Silicon Carbide, Carborundum
Colors
Near Colorless To Light Yellow, Green, Gray, Possibly Greenish Tint

Moissanite (Synthetic) Classification

Common Name

Moissanite (Synthetic)

Species

Moissanite

Variety

Colors

Near Colorless To Light Yellow, Green, Gray, Possibly Greenish Tint

Alternate Names

Synthetic Silicon Carbide, Carborundum

Gemstone Groups

Key Separations

Extreme fire, OTL RI reading, strong doubling through crown or pavilion facets and might have green tint.

Comments

The natural equivalent of moissanite is rare and found as inclusions in other materials. In ceramic form the material is known as the abrasive carborundum.

Moissanite (Synthetic) Optical Properties

Transparency

Transparent

Refractive Index

Over the Limit 2.648-2.691

Birefringence

0.043

Optic Character

Uniaxial

Optic Sign

Positive

Polariscope Reaction

Doubly Refractive (DR)

Fluorescence

SWUV: Inert to moderate orange or blue
LWUV: Inert to weak orange or blue

CCF Reaction

Pleochroism

None

Dispersion

Strength: extreme fire Value: 0.104

Comments

Moissanite (Synthetic) Chemistry & Crystallography

Chemical Name

silicon carbide

Chemical Formula

SiC

Synthesis

flux growth

Crystal System

Hexagonal

Classification

Nature

Synthetic

Crystallinity

Crystalline

Comments

Moissanite (Synthetic) Characteristic Physical Properties

Hardness

9.2

Streak

Greenish Gray

Specific Gravity

3.17-3.24 Typical:3.22

Toughness

Inclusions

Synthetic moissanite might contain white or reflective needles, tube like or plate like inclusions, channels and negative crystals.

Luster

Adamantine

Stability

Fracture

Conchoidal

Cleavage

None

Comments

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