ITEM DETAILS -
sizes may vary because its natural gemstones made by nature sizes are around 0.75-1.25
~ Size - Medium - 0.5- 1 inch (approx.) note: every stone is unique and will vary in shape and size. we aim for 1 inch, but stones will range from 0.5 inch to 1.25 inch (19mm - 32mm)
~ Chemical formula - SiO₂
~ Hardness - 6.5 - 7