The name "iolite" comes from the Greek word for violet. Trichroic Iolite shows three colors when viewed from different angles. Because of Pleochroism, uncut iolite is cut in a certain direction to take advantage of the best color.
It is found in Blue, smoky blue, bluish violet; greenish, yellowish brown, gray; colorless to very pale blue colour.
Significant Gem Localities:-
Iolite is mined in Australia, Brazil, Burma, Canada, India, Madagascar, Namibia, Sri Lanka, Tanzania, Mozambique, Zimbabwe, United States.
Mohs scale hardness 7 – 7.5
WEIGHT PER PIECE OF IOLITE
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OVAL SHAPE
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OCTAGON SHAPE
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PEAR SHAPE
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ROUND SHAPE
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SQUARE SHAPE
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SIZE
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WEIGHT
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SIZE
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WEIGHT
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SIZE
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WEIGHT
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SIZE
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WEIGHT
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SIZE
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WEIGHT
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5*3MM
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0.19
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5*3MM
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0.25
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5*3MM
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0.2
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3MM
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0.11
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3*3MM
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0.13
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5*4MM
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0.3
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6*4MM
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0.5
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6*4MM
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0.3
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4MM
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0.19
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4*4MM
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0.33
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6*4MM
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0.36
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7*5MM
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0.9
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7*5MM
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0.51
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5MM
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0.41
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5*5MM
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0.56
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7*5MM
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0.65
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8*6MM
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1.45
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8*5MM
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0.72
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6MM
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0.65
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6*6MM
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0.95
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8*6MM
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0.94
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9*7MM
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2
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8*6MM
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0.95
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7MM
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1
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7*7MM
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1.6
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9*7MM
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1.5
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10*8MM
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2.65
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9*6MM
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1.07
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8MM
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1.6
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8*8MM
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2.5
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10*8MM
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2
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11*9MM
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3.49
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10*7MM
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1.6
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9MM
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2.26
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10*10MM
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4.95
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11*9MM
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2.93
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12*10MM
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5.29
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12*8MM
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2.6
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10MM
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3.17
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12*10MM
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3.56
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14*10MM
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6.16
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14*10MM
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4.56
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