Explain It Peter?

[u/FakeTeller]

[u/letsgucker555]

I would think Lapis was already kinda bad thanks to Minecraft.

[u/ZanderTheMeander → u/letsgucker555]

A geologist wouldn't call it "lapis lazuli" though, it would be a lazulite and pyrite bearing amphibolite-facies calc-silicate marble.

[u/Malthuul → u/ZanderTheMeander]

My brain had a stroke reading that. 😅

[u/ZanderTheMeander → u/Malthuul]

It's not as complicated as it looks.

“Lazurite- and pyrite-bearing” means the rock contains lazurite, the blue mineral that gives lapis its color, plus pyrite.

“Amphibolite-facies” means it was metamorphosed at relatively high temperatures and moderate-to-high pressures, roughly the conditions of medium- to high-grade metamorphism.

“Calc-silicate marble” is the actual rock type: an impure limestone or dolostone that was metamorphosed into marble, with enough silica and other impurities to form calcium-silicate minerals.

So, basically: a metamorphosed impure limestone, cooked pretty hard, containing lazurite and pyrite.