Sphalerite is a mineral that typically occurs in hydrothermal ore veins associated with other minerals such as galena

This is a natural cluster formation of calcite on calcite crystals or two variations of the mineral found in a cracked concretion in a coal mine in Oskaloosa

Weight and dimensions for each stone are as follows

25 on the Mohs scale

an Ataxite with an ungrouped element structure

Impactite Melt Breccia Suevite | 506.7 grams | Ries Zipplingen, Germany Eucrite Sphalerite is a mineral thatThis is a must have 506. 7 gram Impact Melt Breccia, also referred to as Suevite, coming from Zipplingen and the famous Ries crater Germany. Although not a meteorite, impactites are directly linked to them and their impacts and are probably going to be one of the rarest collection items you'll ever own. Impactite is a slag like glassy object found on the surface of the earth, formed from rock melted by the impact of a meteorite. The term impactite