0MACPHERSONITE (Lead Sulfate Carbonate Hydroxide)
0MAGNESITE (Magnesium Carbonate)
Sale! 3MAGNETITE (Iron Oxide)
0MALACHITE (Hydrated Copper Carbonate)
0MANGANBABINGTONITE (Calcium Manganese Iron Silicate Hydroxide)
0MANGANESE (Mn)
Sale! 1MANGANITE (Manganese Oxide Hydroxide)
0MARBLE (a metamorphic rock from limestone)
*MARCASITE (Group)
0MARCASITE (Iron Sulfide)
0MASSICOT (Lead Oxide)
0MELANITE (the black variety of Andradite Garnet)
0MELANOPHLOGITE (Silicon Oxide with organic compounds)
0MELANTERITE (Hydrated Iron Sulfate)
0MENEGHINITE (Lead Antimony Sulfide)
0MERCURY (Hg)
0MESOLITE (Hydrated Sodium Calcium Aluminum Silicate)
0META-ANKOLEITE (Hydrated Potassium Uranyl Phosphate)
0META-AUTUNITE (Hydrated Calcium Uranyl Phosphate)
0META-TORBERNITE (Hydrated Copper Uranyl Phosphate)
0META-URANOCIRCITE (Hydrated Barium Uranyl Phosphate)
0META-VARISCITE (Hydrated Aluminum Phosphate)
0META-ZEUNERITE (Hydrated Copper Uranyl Arsenate)
0METAMORPHIC (rocks formed via heat and pressure)
0METEORITES (primordial rocks that fell to Earth)
0MIARGYRITE (Silver Antimony Sulfide)
*MICA (Group)
Sale! 3MICROCLINE (Potasium Aluminum Silicate)
0MICROLITE (Calcium Sodium Tantalum Oxide Hydroxide Fluoride)
0MILARITE (Hydrated Potassium Calcium Aluminum Beryllium Silicate)
0MILKY_QUARTZ (variety of Quartz)
Sale! 1MILLERITE (Nickel Sulfide)
Sale! 1MIMETITE (Lead Chloroarsenate)
0MINASGERAISITE - (Y) (Calcium Yttrium Beryllium Silicate)
*MINERALOIDS (Class)
0MINIUM (Lead Oxide)
0MIXITE (Hydrated Bismuth Copper Arsenate Hydroxide)
0MOCTEZUMITE (Lead Uranyl Tellurite)
0MOISSANITE (Silicon Carbide)
0MOLDAVITE (variety of Tecktite: Meteoric Silica Glass)
0MOLYBDENUM (the element Molybdenum)
Sale! 1MOLYBDENITE (Molybdenum Sulfide)
0MONAZITE (Cerium Lanthanum Thorium Neodymium Yttrium Phosphate)
0MONTEBRASITE (Lithium Sodium Aluminum Phosphate Hydroxide Fluoride)
0MONTMORILLONITE (Hydrated Sodium Calcium Aluminum Magnesium Silicate Hydroxide)
0MOONSTONE (variety of Oligoclase, Sodium Calcium Aluminum Silicate)
Sale! 3MORDENITE (Hydrated Calcium Sodium Potassium Aluminum Silicate)
Sale! 1MORGANITE (variety of Beryl, Berylium Aluminum Silicate)
0MOSCHELLANDSBERGITE (Silver Mercury or Silver Amalgam)
Sale! 1MOTTRAMITE (Lead Copper Vanadate Hydroxide)
0MURMANITE (Hydrated Sodium Titanium Niobium Silicate)
Sale! 1MUSCOVITE (Potassium Aluminum Silicate Hydroxide Fluoride)