The Koninderie matrix opal was discovered in Andamooka, South Australia. When discovered the o
The Koninderie matrix opal was discovered in Andamooka, South Australia. When discovered the original weight of the matrix opal was 65.7 kilograms, and at the time believed to be the world’s largest natural matrix opal. The matrix opal was cut in half in 1975. -- source link
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