Search results
Results from the WOW.Com Content Network
Crocoite is commonly found as large, well-developed prismatic adamantine crystals, although in many cases are poorly terminated. Crystals are of a bright hyacinth-red color, translucent, and have an adamantine to vitreous lustre. On exposure to UV light some of the translucency and brilliancy is lost.
Adamantane is an organic compound with formula C 10 H 16 or, more descriptively, (CH) 4 (CH 2) 6.Adamantane molecules can be described as the fusion of three cyclohexane rings. The molecule is both rigid and virtually stress-free.
The luster of a diamond is described as "adamantine", which simply means diamond-like. Reflections on a properly cut diamond's facets are undistorted, due to their flatness. The refractive index of diamond (as measured via sodium light, 589.3 nm) is 2.417. Because it is cubic in structure, diamond is also isotropic
Lustre (British English) or luster (American English; see spelling differences) is the way light interacts with the surface of a crystal, rock, or mineral. The word traces its origins back to the Latin lux , meaning "light", and generally implies radiance, gloss, or brilliance.
For example, anatase is less hard (5.5–6 vs. 6–6.5 on the Mohs scale) and less dense (specific gravity about 3.9 vs. 4.2) than rutile. Anatase is also optically negative, whereas rutile is optically positive. Anatase has a more strongly adamantine or metallic-adamantine luster than that of rutile as well. [8]
Adamantine may refer to: Adamant or adamantine, a generic name for a very hard material; Adamantine (veneer), a patented celluloid veneer; Adamantine lustre, a property of some minerals; Adamantine spar, a mineral; Adamantine, a 2018 album by Burgerkill "Adamantine", a 1996 song by Thirty Ought Six, released as Mute Records 196
Serrabrancaite has monoclinic crystals that range in size up to 0.3 mm. The dark brown to dark greenish-black crystals have an adamantine luster. It will streak olive green, and, on the mohs hardness scale, is a 3.5. In thin fragments, they appear translucent. It is a brittle mineral that has uneven fracture, and it does not demonstrate cleavage.
Name Source Notes Adamant / Adamantine : Greek mythology Adamant has long meant any impenetrably or unyieldingly hard substance and, formerly, a legendary stone or mineral of impenetrable hardness and many other properties, often identified with diamond or lodestone. [1]