|Dimensions (mm)||not provided|
|Weight (carats)||not provided|
This is a natural untreated heckmanite mined in Burma. Hackmanite is usually opaque and however this beautiful gem is transparent.
Hardenss 5 to 6
Weight 0.80 cts app
Size of stone 7.20 x 6.40 x 3.40 mm app
Hackmanite is an important variety of sodalite exhibiting tenebrescence. Conversely, hackmanite from Afghanistan and the Myanmar Republic (Burma) starts off creamy white but develops a violet to pink-red colour in sunlight. If left in a dark environment for some time, the violet will fade again. Tenebrescence is accelerated by the use of longwave or, particularly, shortwave ultraviolet light. Much sodalite will also fluoresce a patchy orange under UV light. (See also photochromism).
Lovely little stones. They are tiny and it would be nice to see a ruler for comparison, but that is only a suggestion! They are included but as accent stones, I'm sure no one will notice. Love them and can't wait to get more1.5 CTS AUSTRALIAN PINK SAPPHIRE PARCEL [ST9271]
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