Rhodochrosite Quartz from Bulgaria

Rhodochrosite from Bulgaria
 
 Rare mineral !
 Ideal for connoisseurs looking for excellence !
 It deserves its place in the most refined collections or the most prestigious showcases .
 
 Origin: Madjarovo mine, Bulgaria
 Size: 7.5 cm by 5 cm by 3.5 cm
 Chemical formula: MnCO3
 Crystal System: Trigonal
 Hardness Mohs scale: 3.5 - 4.5
 Definition: Rhodochrosite is a mineral species composed of manganese carbonate of formula MnCO3 with traces of iron, calcium, magnesium, zinc, cobalt and cadmium (respectively Fe, Ca, Mg, Zn, Co and Cd).