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Viola bellidifolia. Viola cascadensis. Viola adunca is a species of violet known by the common names hookedspur violet, early blue violet, sand violet, and western dog violet. It is native to meadows and forests of western North America, Canada, and the northern contiguous United States. [ 1][ 2]
Viola sororia ( / vaɪˈoʊlə səˈrɔːriə / vy-OH-lə sə-ROR-ee-ə ), [ 5] known commonly as the common blue violet, is a short-stemmed herbaceous perennial plant native to eastern North America. It is known by a number of common names, including common meadow violet, purple violet, woolly blue violet, hooded violet, and wood violet.
Mottramite is an orthorhombic anhydrous vanadate hydroxide mineral, Pb Cu ( V O 4 ) (O H ), at the copper end of the descloizite subgroup. It was formerly called cuprodescloizite or psittacinite (this mineral characterized in 1868 by Frederick Augustus Genth ). Duhamelite is a calcium - and bismuth -bearing variety of mottramite, typically with ...
The diagnostic properties of calcite include a defining Mohs hardness of 3, a specific gravity of 2.71 and, in crystalline varieties, a vitreous luster. Color is white or none, though shades of gray, red, orange, yellow, green, blue, violet, brown, or even black can occur when the mineral is charged with impurities. [4]
Egyptian blue, also known as calcium copper silicate (CaCuSi 4 O 10 or CaOCuO (SiO 2) 4 (calcium copper tetrasilicate)) or cuprorivaite, [ 1] is a pigment that was used in ancient Egypt for thousands of years. It is considered to be the first synthetic pigment. [ 2] It was known to the Romans by the name caeruleum.
Dumortierite is a fibrous variably colored aluminium boro - silicate mineral, Al 7 BO 3 (SiO 4) 3 O 3. Dumortierite crystallizes in the orthorhombic system typically forming fibrous aggregates of slender prismatic crystals. The crystals are vitreous and vary in color from brown, blue, and green to more rare violet and pink.
Prehnite is an inosilicate of calcium and aluminium with the formula: Ca 2 Al (AlSi 3 O 10 ) (OH) 2 with limited Fe 3+ substitutes for aluminium in the structure. [ 7] Prehnite crystallizes in the orthorhombic crystal system, [ 7] and most often forms as stalactitic, botryoidal, reniform or globular aggregates, [ 8] with only just the crests of ...
The name apophyllite refers to a specific group of phyllosilicates, a class of minerals. Originally, the group name referred to a specific mineral, [ 4] but was redefined in 1978 to stand for a class of minerals of similar chemical makeup that comprise a solid solution series, and includes the members fluorapophyllite- (K), fluorapophyllite ...
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