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Found quartz like crystal plate, Striations and crystal pattern diffrent on entire plate. Could not identify

+1 vote

Thease crystals have multiple growth points like pyramid. All crystals quartz  have same growth pattern looks very interesting. Layer are formed very clear. 

asked Mar 18, 2017 by santoshmlokhande (850 points)
edited Mar 28, 2017 by santoshmlokhande

2 Answers

0 votes
To me, this looks like a zeolite or calcite. Zeolites are known for amazing crystal structure that can vary greatly over each specimen. If you are sure this is quartz, then I would guess this was formed under odd metamorphic pressure that caused the crystal faces to form in this shape.
answered May 1, 2019 by linkisnotzelda (5,370 points)
0 votes
The structure and striation formation indicate more like quartz than calcite. I'd suggest trying to do a hardness test. Or see if it reacts to weak acid such as vinegar, which can rule out calcite (quartz won't be affected by most acids.)
answered Jun 5, 2019 by hershel (52,700 points)
It is not affected by acids. Hardness is like quartz. The structure is diffrent
I have seen other quartz in that same habit, and if its not affected by acids and the hardness is like quartz, then that is the most likely candidate. Although most quartz has very typical crystal habits that is hexagonally-shaped with very identifying termination, this more crude type of habit also exists in several localities.