magnesite - white vitreous nodular magnesite - hand/display specimen but the glass remained to

but the glass remained to become part of the sand

or one of those plus some number of coins

apparently hydrothermally altered volcanic ash

Better than average student specimens

sold by Way Too Cool at https://www

magnesite - white vitreous nodular magnesite - hand/display specimen but the glass remained toMagnesite, MgCO3 Magnesite, magnesium carbonate, is usually earthy or granular, but it can be massive vitreous or crystalline and can occur in the form of nodules up to several feet in diameter. This particular magnesite is the cryptocrystalline vitreous form. When vitreous magnesite was first discovered in Muddy Valley, Nevada in the late 1800s, it was thought to be kaolin and plans were made to mine it as such. In 1915, before mining could begin, a