which are both varieties of quartz

5mm and has a weight of 1

The included crystal is visible due to some variation in composition making the boundary of the included crystal visible

At the time of its discovery

with the front

HT Tagamite Impact Melt Rock | 38.6 grams | Dellen Crater, Sweden | SO24 Impact breccia which are both varieties ofThis is a must have 38. 6 gram Impact Melt Rock from the Dellen Crater, north of Stokholm, Sweden. 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 encompasses shock metamorphosed target rocks,