Malacolla / Malacholla
New unnecessary commercial name for … quite surprisingly … a combination of malachite and chrysocolla. Two secondary copper minerals that occur very frequently together. Robert…
Category: Gem or Scam? Library
Malachite
Official mineral name for a green, very common secondary copper mineral with a highly variable external appearance. It is usually found as crystalline aggregates or…
Maligano jasper
Commercial name for a white-yellow-brown-gray-black mottled rock. Most likely a silicified conglomerate, with “landscape structures” and dendrites. Named after the locality of Maligano, Sulawesi, Indonesia.…
Mary Magdalene quartz
Commercial name used for various forms of quartz with inclusions. Mainly for quartz with red hematite inclusions, sometimes making the quartz entirely pink to red…
Master Shamanite™
Unregistered commercial name for black limestone with fossils, introduced by Robert Simmons of Heaven & Earth. This material is claimed to be a very special…
Maraba amethyst
Commercial name for amethyst from the site of “Copia de Maraba Mine” in the Amazon in Brazil, probably referring to Marabá in the Pará region…
Mariam / Miriam jasper/stone
Commercial name for a yellowish-brown to brownish-red sedimentary rock from the Indian Himalayas with light brown lines and arches. The curved lines are transverse sections…
(Rainbow) Mayanite™
Commercial name for quartz with a natural iridescent layer of an iron oxide, probably goethite or limonite. Sole right to use the name Mayanite™ and…
Medusa quartz
A commercial name for quartz with inclusions of the mineral gilalite. Under magnification, the blue and green inclusions resemble Medusa quartz. Medusa quartz from Brazil…
Melody Stone™
Unregistered commercial name used for material said to contain the following combination of minerals: quartz, smoky quartz, rutile in quartz (rutile quartz), amethyst, goethite, lepidocrocite…
