Stone · 3 pieces
Turquoise
Turquoise is a blue to green copper phosphate, one of the oldest gemstones in use.
Read about Turquoise
What is chrysocolla? The blue-green copper mineral explainedChrysocolla is a soft, blue-green copper silicate often mistaken for turquoise. How it forms, why it's usually found with malachite, and how to tell them apart.Glass, dye and heat: an honest guide to what's naturalOpalite, goldstone, cherry quartz, dyed howlite and heated citrine: which popular 'crystals' are man-made or treated, and how to tell.