There are 4 different types of crystals…learn more→
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There are a lot of terms out there around crystals- for anyone looking to dive in deep and explore all the wonderful things about gems, this is a very helpful guide to the different classifications! It’s definitely a review I needed- I pretty much lump things into either “crystals” (any and all gemstones/named stones) or “rocks” (things found outside that I don’t know the name of) 
Awesome video, @Silverbear- thank you for sharing it! 
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