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Corundum on a turn table
Corundum on a turn table
Dr-Lange
red-brown sandpaper with corundum grains
red-brown sandpaper with corundum grains
Dr-Lange
red sandpaper rotates
red sandpaper rotates
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sapphire on a turn table
sapphire on a turn table
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Ruby gemstone on turn table
Ruby gemstone on turn table