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Gem identification

I would be grateful if someone could identify the stones through the picture, origin is Nigeria.
Thank you!

I would suggest taking a RI reading. Use a polariscope to see if they are DR or SR and the optic character. If you have the setup for it an SG will help. All of this will give you the information you need to make an identification. I work with rare and unusual gemstones and have learned that you can’t really tell by looking at it, you need the scientific data.

Highly appreciated Jeffrey,
Thought there was an easier way… setups not available!

What were you told they are or what do you think they are? I see a Trigonal/Hexagonal termination on the top of the piece in the lower left corner. My first impression is good old quartz and my second would be Goshenite.