Traumatic optic neuropathy (TON) refers to an acute injury of the optic nerve secondary to trauma. The optic nerve axons may be damaged either directly or indirectly and the visual loss may be partial or complete.
In Minecraft, emerald ore is very hard to find and is found in small deposits in the Extreme Hills biome. You can usually find emerald ore between 13 and 31 blocks below the ground and close to lava. So if you see a pool of lava in the Extreme Hills biome, that is a great place to start mining downward.
Colombian Emerald buying Guide. Please sign in to like this Guide. In Gemology terms, emerald is a member of the Beryl species of gemstones and get their green color from the presence of chrome. Emeralds are a type 3 gemstone, meaning they are a class of gemstone almost never found without some type of inclusions. Emerlds are a relatively soft gemstone compaired to the other precious gemstones Rubys, Sapphires and Diamonds.