Crystal pieces.... are they worked? All found in close proximity

[Amber111]

Need help here- no offense will be taken. Thank you!!

 

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[RustyRelics]

These are quartz pieces, though technically they're crystals. In my opinion, these are not worked, but quartz is such a crappy knapping material, it's hard for me to tell. Where did you find these?

 

[Amber111]

Thank you. Sierra Nevada’s in Northern California. Here is a better shot of one and another found close by that appears to be worked.