Rainbow Quartz Crystal from Brazil

Rainbow Quartz Crystal 1st choice from Brazil.
Very beautifulpurity!
 
Video:https://www.youtube.com/watch?v=X5ElgQgRTiI&ab_channel=RockMineralValley
 
Origin:Brazil
Size: 17.7 cm by 3.7 cm by 3 cm for 320 gr
Chemical formula: SiO2
Crystal System: Trigonal
Hardness Mohs scale: 7
Definition :Quartz, found across theworld(Brazil, Uruguay, Africa, Mexico, Bulgaria, France…). thequartzis amineral species of the silicate group, subgroup oftectosilicates, made up ofdioxideofsilicon, Wheresilica. It comes in the form of eitherlarge colorless, colored or smoky crystals, or oftranslucent-looking microscopic crystals.