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Can someone please help me identify these rocks please ](https://i.stack.imgur.com/y28zy.jpg)enter image description hereenter image description here

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closed as off-topic by arkaia, Camilo Rada, Fred, trond hansen, Gimelist Apr 1 at 23:21

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  • "Please review our rock identification guidelines to provide the missing information so that your question is both answerable and useful to new users." – arkaia, Camilo Rada, Fred, trond hansen, Gimelist
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This is not a rock but a mineral. A rock is a conglomerate of several crystals, usually of different types of minerals. A crystal is one single systematic structure of atoms.

It would help to see the crystal from more than one perspective, but judging from the pictures available I suggest that is is gypsum.

Wikipedia: Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO. 4· 2H2O.

Plagioclase is also not unlikely.

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  • $\begingroup$ There is not enough information provided in the question to determine if this is gypsum or not. It could be anything. $\endgroup$ – Gimelist Apr 1 at 23:22
  • $\begingroup$ I am confident it is quartz from the crystal form and the striations on one crystal face. If it can be scratched with steel, it is not quartz and might be gypsum but I'm betting it cannot be scratched with steel. $\endgroup$ – haresfur Apr 2 at 0:20

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