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CORUNDUM COLOR CHART

Category： Color chart

The Popular Colors of Corundum:

Pink Sapphire: 1#, 2#, #3; Ruby Red: #5, #7 and #8

Blue Sapphire: #33 Light,#34 Medium and #35 Dark. Yellow Sapphire: #20 and #22

Alexandrite Color change: #45 and #46, Padparadshah: #55, White Sapphire : #12, Kunzite: #60 and #61, #65

6mm Colors Chart Google Album: https://photos.app.goo.gl/oe9R2kHCfjtUgAxR7

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CORUNDUM COLOR CHART

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Popular Colors of Corundum and Spinel Colors FU RONG GEMS

What is Corundum and What are its Basic Qualities?

A: Corundum is an aluminum oxide that commonly forms hexagonal barrel-shaped prisms that taper at both ends or as thin tabular hexagonal plates. It has a hardness of 9 on the Mohs scale, making it one of the most durable commercial gemstones. It has no dominant cleavage and fractures in a conchoidal manner. A high density of ~4.0 g/cm3 (most silicate minerals are ~2.6 g/cm3) results in corundum occurring in secondary placer deposits and recoverable by panning methods, similar to how you would recover placer gold.
Corundum comes in all colours of the rainbow but is most commonly found as opaque crystals with dull colours. Red corundum is called ruby, blue corundum is called sapphire, and all other colours are called fancy sapphires. Some varieties of corundum will fluoresce under short wave and long wave UV light if there is enough chromium in the crystal structure but little iron, which tends to quench any emitted energy.
Physical Properties of Corundum:
Mohs Hardness: 9
Specific Gravity: 3.90 to 4.05
Cleavage Quality:None
Fracture: Uneven,Conchoidal
Optical Properties of Corundum:
Refractive Index: 1.758 to 1.780
Optical Character: Uniaxial/-
Birefringence 0.007 to 0.010
Pleochroism Dichroism: blue - violet-blue and greenish-blue; green - yellowish-green; yellow - pale yellow; purple - violet; orange, yellowish-red - deep crimson.
Dispersion:0.018

Corundum and Spinel colors-6mm Round stones:

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Corundum and Spinel colors Sample Box for sale:6mm Round stones : $25/pc

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Slide Show of the Corundum Color chart 6mm round stones:

 

Or you can Click this picture to view the Clear pictures of Corundum Color chart 6mm round stones in Google album:

 

Corundum-Color-Chart-album

3mm Round Faceted Corundum Gemstones All colors (Google Album) Link:https://photos.app.goo.gl/TzBLy3Zs81U4unoJ7

The Popular Colors of Corundum:

Pink Sapphire: 1#, 2#, #3
Ruby Red: #5, #7 and #8
Blue Sapphire: #33 Light,#34 Medium and #35 Dark.
Yellow Sapphire: #20 and #22
Alexandrite Color change: #45 and #46
Padparadshah: #55,
White Sapphire: #12
Kunzite: #60 and #61 and #65

Contact us for helps if you have any questions.

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