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Hematite (/ ˈ h iː m ə ˌ t aɪ t, ˈ h ɛ m ə-/), also spelled as haematite, is a common iron oxide compound with the formula, Fe 2 O 3 and is widely found in rocks and soils. [6] Hematite crystals belong to the rhombohedral lattice system which is designated the alpha polymorph of Fe 2 O 3. It has the same crystal structure as corundum ...
Untreated tanzanite is a trichroic gemstone, meaning that light that enters this anisotropic crystal gets refracted on different paths, with different colour absorption on each of the three optical axes. As a result of this phenomenon, a multitude of colors have been observed in various specimens: shades of purple, violet, indigo, blue, cyan ...
This is a list of gemstones, organized by species and types. Minerals ... Hematite; Hemimorphite; Herderite; Hexagonite; Hibonite; ... 1.2 C–F. 1.3 G–L. 1.4 M–Q.
The islands have become highly noted for their flora and fauna, attracting ecotourists. One endemic, the Chatham Islands forget-me-not (Myosotidium hortensia), has become a botanical symbol of the islands due to its widespread cultivation in and outside New Zealand. [3] [2] The Chatham archipelago comprises 40 islands and rocks.
Amethyst crystals – a purple quartz Apophyllite crystals sitting right beside a cluster of peachy bowtie stilbite Aquamarine variety of beryl with tourmaline on orthoclase Arsenopyrite from Hidalgo del Parral, Chihuahua, Mexico Aurichalcite needles spraying out within a protected pocket lined by bladed calcite crystals Austinite from the Ojuela Mine, Mapimí, Durango, Mexico Ametrine ...
The vast majority of Bell Islanders did not speak any other language besides English in 2016. A total of 30 people (1.2%) were able to speak French – which is an official language in Canada like English. [189] [190] The most well-known unofficial languages in 2016 were Arabic and Greek; both languages were known by about 10 islanders. [n 18 ...
There are no plant species endemic to the islands; however, one variety of Pandanus tectorius, P. tectorius var. cocosensis, [1] is only found growing on these islands. The native vegetation of the two atolls primarily consists of sea-dispersed shoreline plants of the Indo-Pacific region.
In 1986, California named benitoite as its state gemstone, a form of the mineral barium titanium silicate that is unique to the Golden State and only found in gem quality in San Benito County. [ 80 ] ^ Colorado is the only state whose geological symbols reflect the national flag's colors: red (rhodochrosite), white (yule marble), and blue ...