Not sure what they are exactly but i know its some type of crystal

[rocknrob]

I went to an estate sale and found these sitting outside they weren't even being sold I inquired about them and told them that if they wanted to sell the rocks that were outside in the rosebush area I would give them ten bucks for all three of them this is what I got can anyone tell me exactly what they are and if they are worth anything

 

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[Back-of-the-boat]

Looks like quartz crystals .

 

[DDancer]

I agree, some quartz crystals in mostly massive quartz. Try cleaning them up and I think they'll stand out better.