Joined: Sat May 22, 2010 2:51 am Posts: 755 Location: South Africa
You need to look at the interior of your pieces, using a 10x magnifying lens, to see if there are round bubbles and 'swirls'. See here for examples:
viewtopic.php?f=21&t=21047&hilit=fake+gem+rough . You also need to do some basic tests, like trying to scratch the material with a piece of known quartz. Although we would like to help you, we can't identify material from (fuzzy) photographs.
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