added some stones

Crystals.md

@@ -1,7 +1,28 @@
+### Agate
+https://en.m.wikipedia.org/wiki/Agate
+
+This stone comes in many varieties in real life, and this is reflected in too many stones with blue, gray, green, moss, orange, purple, and red variants. This comes nowhere close to the real world variety, but is a good compromise for my sanity. It almost always has stripes in real life, which were hard to replicate in pixel art, but not impossible. It is considered a crystal by TMS, I am not sure whether it technically is or not. It is not currently renewable in TMS.
+#
 ### Amazonite
 https://en.m.wikipedia.org/wiki/Amazonite
 
-More details to come.
+A milky green crystal that is light green.
+Renewable in TMS by heating the normal block in a furnace to create a budding block.
+#
+### Amber
+https://en.m.wikipedia.org/wiki/Amber
+
+Amber is not a true stone or crystal, but instead hardened tree sap. It is a beautiful honey color, and is usually blobby and small. Frequently found with insects in it. Renewable in TMS through baking the normal variant to crack it.
+#
+### Amethyst
+https://en.m.wikipedia.org/wiki/Amethyst
+
+Purple quartz is referred to as Amethyst. In real life it ranges from Smokey, to fully clear, and from light purple to dark indigo. I went for indigo to set mine apart from other takes on the crystal. Renewable by putting normal amethyst in a furnace.
+# 
+### Black Moonstone
+https://en.m.wikipedia.org/wiki/Moonstone_(gemstone)
+
+Moonstone comes in many colors, and black Moonstone is one. It tends to be iridescent in real life, but I knew it would look better to catch it from one angle instead of trying to do all of them.
 #
 ### Carnotite
 https://en.m.wikipedia.org/wiki/Carnotite