The term "hematoid" comes from the name of the mineral hematite. Typically, the classification of the different types of iron refers to the iron's oxidation number, and iron has many states of oxidation (loss of electrons in an atom). This term is often used to denote minerals containing iron (the specific distinction of the type of iron is not necessary for the scope of this article). ![]() You may see the word ferric (or ferrous) used to refer to iron in quartz. (the Hudson Institute of Mineralogy) says that usually when red is found in clear quartz it's typically goethite or hematite it's actually rare to find lepidocrocite in clear quartz. And, finally, lepidocrocite is yet another iron oxide mineral, red to reddish-brown. Some sources say there can also be a golden-colored coating on the stone’s surface. Limonite is what gives Golden Healer Quartz its color–inclusions within the crystal make it look yellow (not to be confused with Citrine Quartz). Like goethite, it's a pseudomorph (again, due to environmental changes such as weathering, exposure to water, etc.). Much of what is called limonite is actually goethite. It can give quartz a yellowish-brown color. Limonite is actually not a true mineral but a combination of minerals. And, to add to the confusion, there's also the mineral limonite. Then there's the mineral goethite, another mineral that contains iron (goethite is a component of rust) it can be formed by the weathering of other minerals. Here's the first point of confusion: which type of iron is included in the quartz? First, there's hematite-the main ore of iron-which ranges in appearance from black to silvery-gray to red. These are all essentially just slight variations of the same type of quartz-quartz with inclusions (or sometimes coatings) of iron. You may know it as Harlequin Quartz, Red Quartz, Tangerine Quartz, Strawberry Quartz, Hematoid, or Ferruginous Quartz. It is a reddish-orange quartz, but there are so many variations of color and pattern that many different names have been created to describe it. Fire Quartz is a prime example of this difficulty. ![]() Since it's one of the most abundant minerals on earth, and it can be found in so many varieties, there's bound to be some confusion when distinguishing among the different types. In the practice of crystal magic, few would argue about the importance of quartz.
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