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 Home / Gem Library / Natural Gemstones / Color Change Sapphire December 10, 2023  

Natural Color Change Sapphire
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There are 8 Color Change Sapphire(s) available at

Sapphires which change color as a result of exposure to different light conditions are known as color change sapphires.

Known Facts
Color Key: Color changing blue to purple, greenish brown to red.
Refractive Index: 1.759-1.778
Chemical Composition: AL22O3
Hardness: 9
Density: 4.00
Crystal Group: Hexagonal
Ocurrence: Ceylon, East Africa
Month of the year: September

While many sapphires may exhibit faint color changes upon exposure to incandescent or fluorescent lights occasional stones may display dramatic changes. Most color change sapphires belong to one of two groups depending on their color change; the green to red (alex type), and the blue to purple kind. Most alex type color change sapphires are from Songea, Tanzania while the blue-purple types occur in Madagascar, Sri Lanka, Burma, and other parts of East Africa and Tanzania. In all color change stones, the strength of the change is probabably the most important factor affecting the value of the stones.

Some people prefer the green to red change while others prefer the blue to violet change. The blue to violet change is probably worth more but there are exceptions and a stone with a strong green to red change would also be quite valuable.

Color Change Sapphire
Check our Top, Largest, Smallest or Latest Color Change Sapphire's.

Color Change Sapphire Stats/
Popularity Index: 265216hits
Total Items: 8items
Total Weight: CTS 14.59
Cheapest: USD 84.24
Most Expensive: USD 4608.00
Largest: CTS 5.12
Smallest: CTS 0.78
Last Added: 10/11/19 08:36:24

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