Malaia Garnet | Gemopedia

Discovered in the mid 1960's in Tanzania's Umba Valley, this red-orange to pink-orange variety of garnet was originally thought to be spessartite garnet. Actually a mixture of pyrope and spessartite, malaia garnets are lively gems that exhibit sparkling red flashes. Once discovered not to be spessartite, it soon became known by the Swahili word malaia, meaning "out of the family." Malaia garnets are available in numerous shades of orange, ranging from soft peach to intense reddish orange.
Alternate
Names
Malaya Garnet
Colors
Light To Dark, Slightly Pinkish Orange, Reddish Orange, Yellowish Orange

Malaia Garnet Classification

Common Name

Malaia Garnet

Species

Pyrope-Spessartite

Variety

Malaia Garnet

Colors

Light To Dark, Slightly Pinkish Orange, Reddish Orange, Yellowish Orange

Alternate Names

Malaya Garnet

Gemstone Groups

Garnet

Key Separations

RI, SR nature and spectrum.

Comments

Sometimes stones display color change.

Malaia Garnet Optical Properties

Transparency

Transparent

Refractive Index

1.75-1.78

Birefringence

Optic Character

NA

Optic Sign

NA

Polariscope Reaction

Singly Refractive (SR) With ADR

Fluorescence

SWUV: Inert
LWUV: Inert

CCF Reaction

Pleochroism

None

Dispersion

Strength: moderate fire Value: 0.022

Comments

Malaia Garnet Chemistry & Crystallography

Chemical Name

magnesium aluminium garnet or manganese aluminium garnet

Chemical Formula

((Mg, Mn)3Al2(SiO4)3)

Synthesis

Crystal System

Cubic

Classification

Silicate

Nature

Natural

Crystallinity

Crystalline

Comments

Malaia Garnet Characteristic Physical Properties

Hardness

7-7.5

Streak

White

Specific Gravity

3.78-3.85

Toughness

Varies

Inclusions

Malaia garnet is a type II clarity stone. Stones sometimes contains rutile, apatite and pyrite mineral inclusions and intersecting needles.

Luster

SubAdamantine

Stability

Good

Fracture

Conchoidal

Cleavage

None

Comments

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