Phosphosiderite | Gemopedia

Phosphosiderite is a vibrant purple orchid color and is a relative newcomer to the world of gemstones as it was only discovered in the late 19th century. Fine quality phosphosiderite is hard to come by and this opaque gemstone may contain veins of yellow. In addition to purple, phosphosiderite occurs in colors ranging from white, pink, red, violet red and colorless.
Colors
Red, Reddish Violet, Reddish Purple, Lavender, Pink, Dark Blue, Yellow-Orange, Moss Green To Almost Colorless

Phosphosiderite Classification

Common Name

Phosphosiderite

Species

Phosphosiderite

Variety

Colors

Red, Reddish Violet, Reddish Purple, Lavender, Pink, Dark Blue, Yellow-Orange, Moss Green To Almost Colorless

Alternate Names

Gemstone Groups

Key Separations

RI and SG

Comments

Phosphosiderite Optical Properties

Transparency

Transparent - Opaque

Refractive Index

1.692-1.739

Birefringence

0.046

Optic Character

Biaxial

Optic Sign

Negative

Polariscope Reaction

Doubly Refractive (DR)

Fluorescence

SWUV:
LWUV:

CCF Reaction

Pleochroism

Trichroic, weak to moderate pinkish red, purplish red, and colorless

Dispersion

Strength: extreme fire

Comments

Phosphosiderite Chemistry & Crystallography

Chemical Name

hydrated iron phosphate

Chemical Formula

Fe3+PO4.2H2O

Synthesis

Crystal System

Monoclinic

Classification

Phosphate

Nature

Natural

Crystallinity

Crystalline to Aggregate

Comments

Phosphosiderite Characteristic Physical Properties

Hardness

3.5-4

Streak

Specific Gravity

2.74-2.8

Toughness

Poor

Inclusions

Phosphosiderite sometimes has botryoidal or radial fibrous structure and might have yellow veins.

Luster

Vitreous

Stability

Fracture

Uneven

Cleavage

Good, in one direction, Poor, in one direction

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