/r/Minerals

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Is this petrified wood?

2 upvotes • TheMuffinMan39

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A piece of rough Maw Sit Sit jade showing stunning green kosmochlor inclusions

2 upvotes • Skraporc

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Is this partially devitrified obsidian? Is this replaced by cristobalite or perlite or rhyolite or Trachyte or what?

2 upvotes • DinoRipper24

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Understanding Coal Formation, Types, and Uses

2 upvotes • Dear-Amphibian5542

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Very Beautiful & Rare tsavorite Garnet Cut stone, 3.85 Carat

2 upvotes • No-Stress-556

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Mom bought this, marked as “Celestite”

2 upvotes • ShoeMoo321

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Back w/ better pics. Copper crystals?

2 upvotes • probably_sarc4sm

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Anything here interesting?

2 upvotes • KrajcFarliy

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Are these fossilized bone or???

1 upvotes • spicynoodlezzz111

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Any Mineral Database w/ price?

1 upvotes • AnhCloudB

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Is this petrified wood?	2	TheMuffinMan39
A piece of rough Maw Sit Sit jade showing stunning green kosmochlor inclusions	2	Skraporc
Is this partially devitrified obsidian? Is this replaced by cristobalite or perlite or rhyolite or Trachyte or what?	2	DinoRipper24
Understanding Coal Formation, Types, and Uses	2	Dear-Amphibian5542
Very Beautiful & Rare tsavorite Garnet Cut stone, 3.85 Carat	2	No-Stress-556
Mom bought this, marked as “Celestite”	2	ShoeMoo321
Back w/ better pics. Copper crystals?	2	probably_sarc4sm
Anything here interesting?	2	KrajcFarliy
Are these fossilized bone or???	1	spicynoodlezzz111
Any Mineral Database w/ price?	1	AnhCloudB