Celestine's geode

Celestine geode from Madagascar
 
 Geode TOP ! 1st choice, magnificent and intense color !
 This Geode will bring satisfaction to the most demanding .
 It deserves its place in the most refined collections or the most prestigious showcases .
 Tabular crystals .
 
 Size: 21 cm by 17.5 cm by 16 cm for + or- 10Kg
 Chemical formula: Sr [SO4]
 Crystal system: Orthorhombic
 Hardness Mohs scale: 3 to 3.5
 
 Definition: Celestines are amineral species composed of strontium sulfate SrSO4.
 Their colors range from sky blue to transparent white ( gemstone ), the crystals can be tabular or spiked , they are often found in the form of geodes or free crystals , but also in rough or polished pebbles .