A polished blue apatite sphere from the Anosy region of Madagascar, showing the blue-green hues typical of the natural material. Apatite is the mineral that defines level 5 on the Mohs hardness scale, the reference point geologists learn hardness against, and the same mineral family your teeth and bones are built from. A curved polished surface shows its depth of colour at its best.
Mineral: Blue apatite (fluorapatite, Ca₅(PO₄)₃(F,Cl,OH))
Crystal system: Hexagonal
Origin: Anosy region, Madagascar
Hardness: 5 on the Mohs scale; softer than quartz, handle with care
Treatment: None known. Natural blue-green colouring; not heat-enhanced as far as we can determine
Diameter: 5.9 cm
Weight: 340 g
Note: Acrylic stand included (not the stand shown in the photo)
You'll receive the exact piece photographed.