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Original Message:   Re: hematite?/ Measure Specific Gravity!
Hi, If you have the tools-you can measure Specific Gravity to rule out certain minerals.

For instance Specific Gravity of Hematite = 5.3 Grams/cc Specific Gravity of Schorl (Black tourmaline) = 3.15 gm/cc. Specific Gravity of Onyx = 2.70 gm/cc

https://www.youtube.com/watch?v=yGnNE-MWDV4&feature=emb_title

http://gemologyproject.com/wiki/index.php?title=Specific_Gravity

We just used this test and it works!

Good Luck and please let us know!

P.S. This technique works for minerals of Uniform composition- not Mixes or conglomerates

Anne

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