Padparadscha Sapphire | Gemopedia

While sapphires have mesmerized gem and jewelry connoisseurs since the dawn of time, one fancy sapphire variety has a distinct allure and prestige all its own--the mysterious and coveted padparadscha sapphire. The padparadscha derives its name from the Sanskrit "padma ranga" meaning "lotus color," for its resemblance to the beautiful and famed lotus flowers of Sri Lanka, where the gem was originally found. Padparadscha sapphires traditionally must combine elements of pink and orange in one gem to rightly claim their padparadscha title, though the coloration requirements are highly disputed.
Colors
Intense Light To Medium Pinkish Orange To Orange-Pink

Padparadscha Sapphire Classification

Common Name

Padparadscha Sapphire

Species

Corundum

Variety

Padparadscha Sapphire

Colors

Intense Light To Medium Pinkish Orange To Orange-Pink

Alternate Names

Gemstone Groups

Key Separations

RI, birefringence, pleochroism, magnification, color and spectra

Comments

Padparadscha means lotus flower and this where this variety gets its name.

Padparadscha Sapphire Optical Properties

Transparency

Transparent - Opaque

Refractive Index

1.762-1.77
Tolerance:(+0.009/-0.005)

Birefringence

0.008-0.01

Optic Character

Uniaxial

Optic Sign

Negative

Polariscope Reaction

Doubly Refractive (DR)

Fluorescence

SWUV: Inert
LWUV: Orange:Inert to strong orangy red

CCF Reaction

Pleochroism

Dichroic, strong yellowish orange and colorless

Dispersion

Strength: weak fire Value: 0.018

Comments

Padparadscha Sapphire Chemistry & Crystallography

Chemical Name

aluminum oxide

Chemical Formula

Al2O3

Synthesis

Crystal System

Trigonal

Classification

Oxide

Nature

Natural

Crystallinity

Crystalline

Comments

Padparadscha Sapphire Characteristic Physical Properties

Hardness

9

Streak

White

Specific Gravity

3.95-4.1 Typical:4

Toughness

Excellent

Inclusions

This stone has type II clarity and sometimes will have silk, rutile, boehmite or zircon crystals and fingerprint inclusions. Stones can show hexagonal growth and color zoning. Untreated stones will usually have inclusions intact. Heat treated stones will have fracture halos or snowballs around crystal inclusions( untreated stones from magmatic areas might also show these characteristics). Silk will be broken and might show sintered areas especially around the girdle.

Luster

SubAdamantine

Stability

Very Good

Fracture

Conchoidal

Cleavage

None

Comments

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