Pyrope-Almandite Garnet | Gemopedia

Unusually striking, pyrope-almandite garnet is a naturally occurring garnet blend. While raspberry is the most prized color, it is also found in shades of pink through lavender. This gem is typically found as water-worn pebbles in alluvial deposits, but it is also occasionally mined directly from host metamorphic rock. Tough, durable, never enhanced and easily cleaned, pyrope-almandite garnet is ideal for jewelry, usually referred to as "rhodolite garnet." Due to its bright transparent clarity, it is often cut into fantasy shapes.
Alternate
Names
Rhodolite Garnet
Colors
Orangy Red To Brownish Red, Dark Red, Light To Dark Purplish Red Through Reddish Purple

Pyrope-Almandite Garnet Classification

Common Name

Pyrope-Almandite Garnet

Species

Pyrope-Almandite Garnet

Variety

Colors

Orangy Red To Brownish Red, Dark Red, Light To Dark Purplish Red Through Reddish Purple

Alternate Names

Rhodolite Garnet

Gemstone Groups

Garnet

Key Separations

RI, SR nature and spectrum.

Comments

Stones are only rhodolite garnet if there is a purple component to the color.

Pyrope-Almandite 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

Pyrope-Almandite Garnet Chemistry & Crystallography

Chemical Name

magnesium iron aluminum silicate

Chemical Formula

(Mg,Fe)3AL2(SiO4)3)

Synthesis

Crystal System

Cubic

Classification

Silicate

Nature

Natural

Crystallinity

Crystalline

Comments

Pyrope-Almandite Garnet Characteristic Physical Properties

Hardness

7-7.5

Streak

Specific Gravity

3.68-3.88 Range:0.1/-0.1 Typical:3.78

Toughness

Good

Inclusions

Pyrope-almandite garnet is a type II clarity stone. Needle like inclusions, zircon crystals with stain halos and irregular rounded included crystals that might be zircon or apatite.

Luster

Vitreous

Stability

Good

Fracture

Conchoidal

Cleavage

None

Comments

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