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Opal Size Chart
Dark Crystal Opal Parcel from Mintabie, Australia.
This is an interesting parcel of dark crystal opals from the Mintabie region. The average size is 6.5 x 5mm but they have varying styles of cuts - two in low cabochon cut with about 2 mm thickness and one in a medium cabochon cut and 3.3mm thickness. The stones are small and simple but attractive with an enticing play of green-orange and blue-red colors.
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