Moldavite piece
1.5cm x 0.7cm 
A little info:
First discovered in 1786. Formed when a meteorite stuck Stuttgart, Germany, 14 million years ago. The crater can still be seen today, its called the Ries crater. Debris landed in Austria and Czech Republic. 
Crystal healing properties are believed to be help magnify other crystals properties as well as helping to connect to the higher self. It is a highly powerful stone and is sometimes too strong for certain individuals.