Please expect some slight variation in terms of color, transparency, size and shape, as there are some variations unique for each stone. Note that all crystals are natural, so sometimes little imperfections can appear. Type: Blue Aragonite Colors: Turquoise blue, sky blue, bluish green, brown Transparency: Opaque Transparency: Opaque - Translucent Mohs hardness: 3,5 - 4 Approx measurements: 30mm - 50mm Approx weight: 100g - 400g Origin: Pakistan * All crystals are natural, we don't sell synthetic stones. * The pictures shown are of the actual stones that you will receive or very similiar if so indicated. All stones are natural, so little imperfections and different colors can appear. * Stones are always measured in millimeters (mm) and inches ("). * The dimensions indicate the length x width x thickn