Was wondering if these we're calcite or a quartz type. If anyone has any idea would appreciate it ty

[Julieb]

 

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[Red-Coat]

Looks more like calcite, but appearances can be deceptive. Some strong acid spotted onto it will tell you (look for bubbles, and you may need a loupe to examine closely). A proprietary kitchen/bathroom limescale remover works as a suitable acid source.

 

[Julieb]

Looks more like calcite, but appearances can be deceptive. Some strong acid spotted onto it will tell you (look for bubbles, and you may need a loupe to examine closely). A proprietary kitchen/bathroom limescale remover works as a suitable acid source.

Ty much