Cuprite. Adamantine Luster: Like the vitreous luster, but VERY shiny. Silky - Pearly: Silky and pearly lusters. Mineralogists have special terms to describe luster. Minerals that are as brilliantly reflective as diamond have an adamantine luster. Such minerals are transparent or translucent, and have a high refractive index (of 1.9 or more). Adamantine luster means that the diamond has good transmitting properties and reflects light brilliantly. In Geology and in Manufacturing enginnering, Adamantine is a mineral, often referred to as adamantine spar. Certain minerals with a resinous or adamantine luster – such as sphalerite and cinnabar respectively – can appear submetallic. Satin Spar. Adamantine is also used as an adjective to refer to non-metallic, brilliant light reflecting and transmitting properties, known as adamantine luster. Covalent bonding or the presence of heavy metal atoms or transition elements may result in adamantine luster. Silky Luster: Fibrous. Adamantine luster in Ruby. It has nothing to do with color or shape, but is related to transparency , … Luster describes the reflection of light off a mineral's surface. Another common nonmetallic luster is called translucent luster, where you can see into the mineral, but not completely through it. Adamantine minerals possess a superlative lustre, which is most notably seen in diamond. It is a silky brown form of corundum. When looking for an earthy luster, picture substances such as clay, chalk, potting soil, and ground cinnamon. Adamantine: A hard, brilliant luster. Silky: The luster of silk. Silky: Noticeable shiney direction, eg. Adamantine minerals, such as a diamond, possess remarkable luster. A brilliant luster such as the sparkling reflection of diamond is known as adamantine. It is a silky brown form of corundum. Subadamantine: Not quite adamantine in luster. Comics Minerals of adamantine luster have high refractive indices (1.9-2.6) and are highly dispersive and translucent. With a little practice, luster is as easily recognized as color and can be quite distinctive, particularly for minerals that occur in multiple colors like quartz. Care needs to be taken in deciding which of these lusters a particular mineral … Minerals that are adamantine have a high refractive index and are translucent or transparent. For example, the brilliant mirror-like appearance of a diamond is called adamantine. This is how you would tell someone how a mineral looks. Adamantine: A hard, brilliant luster. Adamantine is a mineral, often referred to as adamantine spar. High index of refraction in nearly opague minerals: Schiller: Caused by numerous platy inclusions or separations. Pearly Luster:Think about mother-of-pearl or the inside of a sea shell. It comes from the Greek and Latin word Adamas which applied to substances having the hardness or luster of a diamond. A diamond is a good example of the adamantine luster. Adamantine Luster: Silky Luster: Gumdrop Luster: Pearly Luster: Metallic Luster: Luster is a description of the way light interacts with the surface of a crystal. Sub Metallic: Almost metallic reflection, eg. Types of Gemstone Luster. In the mineral world, luster comes in two main types: non-metallic and metallic. One simple way to classify luster is based on whether the mineral … Adamantine figuratively means unyielding and inflexible. Other articles where Adamantine lustre is discussed: mineral: Lustre: asbestos [Mg3Si2O5(OH)4]); and adamantine, having the brilliant lustre of diamond, exhibited by minerals with a high refractive index comparable to diamond and which as such refract light as strongly as the latter (examples are cerussite [PbCO3] and anglesite [PbSO4]). 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