Blue calcite crystal sphere stone. You get one blue calcite ball very similar to appear in the image above, picked at random. Please expect some slight variation in terms of color, transparency, size and shape, as there are some variations unique to each stone. Note that all crystals are natural, so sometimes little imperfections can appear. Available in the following approx sizes/weights: S Medium: 45mm - 50mm (130g - 150g) Medium: 50mm - 55mm (140g - 200g) L Medium: 55mm - 60mm (200g - 300g) Type: Calcite Color: Blue Transparency: Opaque Mohs hardness: 3 Polished: Polished on all sides Shape: Sphere Approx measurements: 45mm - 60mm/1.7" - 2.3" Approx weight: 130g - 300g Origin: Madagascar