Mineral Name: Echo Crystal
Color: Transparent with a faint yellow tint
Mineral Location: Caves and underground chambers
Mineral Rarity: Rare
Moh Hardness Ranking: 4
Melting Point: 1750°C
Market Value: 1 gold coin per crystal
Description: Echo Crystal is a rare mineral that forms in caves and underground chambers where sound is often bouncing off the walls and hitting the crystal repeatedly. Its unique property is its ability to emit a musical sound when struck or hit. The sound varies depending on the size and shape of the crystal along with the force of the impact, with larger crystals producing deeper notes and smaller ones producing higher-pitched sounds. Echo Crystal is highly valued by musicians and sound crafters, who use it to create musical instruments and audio equipment. The mining and harvesting of Echo Crystal is a delicate process, as the crystals are easily damaged by excessive vibrations or rough handling. As a result, Echo Crystal is a rare and expensive mineral.