MACPHERSONITE (Lead Sulfate Carbonate Hydroxide)
MAGNESITE (Magnesium Carbonate)(Information)
MAGNETITE (Iron Oxide)
MALACHITE (Hydrated Copper Carbonate)( Information)
MANGANBABINGTONITE (Calcium Manganese Iron Silicate Hydroxide)
MANGANITE (Manganese Oxide Hydroxide) * MARCASITE (Group)
MARCASITE (Iron Sulfide)
MARMATITE ( Ferroan Sphalerite )( Sphalerite Info )
MASSICOT (Lead Oxide)
MELANITE ( A titanium containing garnet )
Melanite & Perovskite
MELANOPHLOGITE (Silicon Oxide with organic compounds)
MELANTERITE (Hydrated Iron Sulfate)
MENEGHINITE (Lead Antimony Sulfide)
MERCURY (Hg)(Cinnabar & Mercury Information)
MESOLITE (Hydrated Sodium Calcium Aluminum Silicate)(Information)(zeolite group Info.)
META-ANKOLEITE (Hydrated Potassium Uranyl Phosphate)
META-AUTUNITE (Hydrated Calcium Uranyl Phosphate)
META-TORBERNITE (Hydrated Copper Uranyl Phosphate)
META-URANOCIRCITE (Hydrated Barium Uranyl Phosphate)
META-VARISCITE (Hydrated Aluminum Phosphate)
META-ZEUNERITE (Hydrated Copper Uranyl Arsenate)
MICA- PHLOGOPITE ( magnesium, aluminium, iron silicate.)( Information)
MIARGYRITE (Silver Antimony Sulfide) * MICA (Group)
MICROCLINE (Potasium Aluminum Silicate)(Amazonite Info)(Feldspar Group)
MICROLITE (Calcium Sodium Tantalum Oxide Hydroxide Fluoride)
MILARITE (Hydrated Potassium Calcium Aluminum Beryllium Silicate)
MILLERITE (Nickel Sulfide)
MIMETITE (Lead Chloroarsenate)
MINASGERAISITE - (Y) (Calcium Yttrium Beryllium Silicate)
MINIUM (Lead Oxide)
MOISSANITE (Silicon Carbide)
MOLDAVITE (variety of Tecktite: Meteoric Silica Glass)
MOLYBDENITE (Molybdenum Sulfide)
MONAZITE (Cerium Lanthanum Thorium Neodymium Yttrium Phosphate)
MONTEBRASITE (Lithium Sodium Aluminum Phosphate Hydroxide Fluoride)
MONTMORILLONITE (Hydrated Sodium Calcium Aluminum Magnesium Silicate Hydroxide)
MORDENITE (Hydrated Calcium Sodium Potassium Aluminum Silicate)
MORGANITE (variety of Beryl, Berylium Aluminum Silicate)
MOSCHELLANDSBERGITE (Silver Mercury or Silver Amalgam)
MOTTRAMITE (Lead Copper Vanadate Hydroxide)
MURMANITE (Hydrated Sodium Titanium Niobium Silicate)
MUSCOVITE (Potassium Aluminum Silicate Hydroxide Fluoride)(Info)(Mica Group)