Graphic... Moonstone? Locality?

[u/Not_So_Rare_Earths]

Polished on one side. Does appear to be graphic Granite with adularescent Feldspar, but does anybody know a possible locality for it? I turned up nothing on my searches.

[u/PicrolitePicker]

"Graphic Peristerite" seems to align with all these properties and can be found in Canada and Madagascar.

[u/Not_So_Rare_Earths → u/PicrolitePicker]

Thank you! I'll call this one solved.

[u/spider-season]

Super cool! Are those negative shapes casts of other crystals?

[u/Not_So_Rare_Earths → u/spider-season]

The darker, deltoid crystals are (smoky?) Quartz. To my knowledge, both parts of this rock grew simultaneously and nothing has been altered or replaced. Mindat has a nice page on graphic texture.

[u/spider-season → u/Not_So_Rare_Earths]

Ohhh I see what you mean now! It looks like there are impressions due to the smokies but it’s actually flat. Super cool!

[u/PicrolitePicker]

u/Ben_Minerals

Curious on your thoughts.

[u/Ben_Minerals → u/PicrolitePicker]

Great thought! I agree with your ID. Such rocks are known from pegmatites in Ontario and Quebec. Not too sure about Madagascar.

[u/Not_So_Rare_Earths → u/Ben_Minerals]

Thank you as well!

[u/PicrolitePicker → u/Ben_Minerals]

Thanks! 🫡

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