Magnesite contains mostly magnesium, and occurs primarily in igneous and sedimentary rocks.  Its color is colorless, white, greyish-white, yellowish, brown, pink, and lilac.  It has a moh's hardness of 3.5-4.5.  

Objects: Magnesite Export: JSON - XML - CSV Clay Seals and Sealings

Object U Number Museum Number (UPM Date Reg Number) Museum Number (BM Registration Number) Museum Number (UPM B-number) Description (Catalog Card)
9187 (none) (none) B16871 Cylinder seal White shell Burnt and reduced to lime. Scene: fighting men and animals.
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