Crystal System; Orthorhombic
Color: Colorless, white, gray, yellowish, reddish, green
Hardness: 3 1/2 - 4
Fracture: Subconchoidal, brittle
Specific Gravity: 2.9
Transparency: Transparent to translucent
Aragonite is commonly considered to have identical chemical compositions to the more common mineral calcite, which makes apart of the carbonate group. Aragonite rather forms in more limited geological environmental conditions, which makes it more of a calcium carbonate. Its rather commonly known as mineral that is relatively unstable and can also become altered to calcite. The difference between Aragonite and Calcite is that Aragonite belongs to the Orthorhombic crystal system, while calcite belongs to the trigonal crystal system. Many crystals of aragonite are considered to be often twinned that takes on a hexagonal appearance, but can also come in a single crystals that are often prismatic. In some cases, it may also be columnar, stalacititic, radiating, or even fibrous. It can also sometimes appear similar to calcite, aragonite is easily distinguished by the absence of rhombohedral cleavage. It can also be various colors that ranges from white, colorless, gray, yellowish green, blue, reddish, violet, or even brown in color.
Aragonite is mainly found in oxidized zones of ore deposits and elsewhere, that's formed at low temperatures near the surface of the Earth. It can also be found in caves as stalactites, that's formed around hot springs, and in mineral veins, which can also occur in coral-like aggregates in iron ore deposits that are associated with siderite. Aragonite is commonly also referred as flos ferri, which means flowers of iron. In some cases, its also the banded stalactitic material that is polished or as an ornamental stone, and transparent crystals are rarely faceted for collectors. Aragonite is also considered to be produced by biological processes yet to be fully understood. Facet quality crystals of Aragonite are typically found in Czech Republic, superb cave growths from Mexico, flos ferri from Austria, and Greece, with fine crystals coming from Morocco, England, France, Germany, Italy, Hungary, Japan, and numerous other localities in the U.S. It may also be discovered in some metamorphic and igneous rock types depending on the condition of the environment,
Aragonite rather has its own chemical formula that's commonly known as CaCo3, and is apart of the Orthorhombic crystal system. The mineral Aragonite it self is typically considered to have actually been named in 1797, from the main area it was discovered in (Molina de Aragon, in the province of Guadalajara, in Castilla La-Mancha, Spain. Its also considered to be thermodynamically unstable at temperature and pressures, and tends to also alter to calcite on scales 10 to 10 years.
Name: Tiger's Eye
Deposit Area - Unknown
Group: Silica- Silicon Dioxide
Color: Golden to Red Brown
Hardness: 5 1/2 - 6
Specific Gravity: 2.7
Tigers Eye - Quartz is also referred as Tiger's Eye, which is considered a semiprecious variety of quartz exhibiting chatoyancy, a vertical luminescent band like that's recognized as a cats eye. Unlike cat's eye quartz, tiger eye is form in a unique way as parallel veins of crocidolite (Blue Asbestos) fibers become altered to iron oxides and the replace by silica. From this result, it is commonly more opaque and has a rich yellow to brown color. When it becomes cut, the gem has fine lusters, in which the main production source of tigers eye is Griquatown West, in South Africa. Some other areas where it commonly be found can also included Western Austrailia. Another gem called Hawkeye is also similar to tigers eye except that the crocidolite is replaced by quartz without altering to an iron oxide, and it retains the gray blue of the original asbestos. Tiger's eye is rather considered as a metamorphic type of gem that has a golden to a red brown color. The semiprecious gem is rather considered to be composed of silicon dioxide which has a chemical formula of SiO2, and mainly colored by iron oxide.
This photo shows that the Crocidolite which is a blue asbestos is only semi oxide by the iron oxide stages as some can still be seen.
Petrified wood is commonly regarded as a special type of fossilization that mainly the remains of terrestrial vegetation, and can also be the remains of natural manufactured wood. The process of getting to this type of formation takes up to several years for it to be completely fossilized. Ongoing research by OntarioExplorations101 has notice that wood can actually fossilize in about 30 to 45 years depending on the size of it. Some petrified wood can also be dated to millions of years depending on the condition and if its not found by someone. This was notice on the basis of how mine wood can become fossilized to a point of pure rock which is taken from various minerals associated with that environment. One typical mine we focus on was the Kanichee Polymetallic Mine site as lots of wood was used in the making of this mine, and remains in fossilized state to this day. This also includes the process of also petrifying saw dust into another typical fossilization known as Petrified Saw Dust. These two forms of petrifying are known to also be built up of various or one type of mineral that usually petrified saw dust comes into contact with. The way this is commonly done is that all the organic type of minerals have rather been replace by minerals. Only one conclusion to this is how does treated/painted mine wood become petrified when its not all natural organics that come to its process of becoming lumber. it also depends on the size of the wood but smaller pieces like this one take approximately 30 to 45 years to form. By taking this smaller piece, you can actually construct the age pattern of that petrified wood from a much smaller scale
There are a number of different type of petrified wood that can include lumber is a typical one that can consist of Conifers and Angiosperm, and not least lumber on its own under specific conditions. Conifers are regarded as plants that can produce by the mean of an exposed seed, including all conifers that are known as gymnosperms. Conifers are considered as shrubs or trees that commonly produce woody cones of various shapes, and sizes. These leaves are often needle shaped but can also be flat and broad, which makes their woody trunks often rich in resin. Coniferous fossils can either be needles or leaves, cones, or even the wood it self. Once the wood becomes a fossil it is commonly now referred as petrified wood, and a large portion of fossilized petrified wood is also found in the Arizona Petrified Forest.
Angiosperm plants, comprise of nearly 250,000 living species, which had first appeared in the early cretaceous. although the oldest fossil remains from that time are limited to pollen grain. Some of the earliest angiosperm fossils are also commonly similar to most common types of herbaceous bush plants. It was also at the beginning of the Late Cretaceous time period, when woody angiosperm began to evolve including several modern groups, such as magnolia, laurel, sycamore, and rose families. In general, the woody angiosperm are typically known for having broad leaves which often become fossilized, but fossilized angiosperm wood is also difficult to distinguish from fossil conifers
The way that wood fossilizes is typically formed when a tree had died or fell, some were also deposited directly in river beds or on floodplains, while others were washed into the current area of the forest flood water. Most of the trees become decomposed, while others were buried in the accumulating sediments, that include a considerable amount of volcanic ash. At this point, the silica content of the ash became dissolved by the accumulation of ground water, and as it became percolated downward, it filled or had replace cell walls, as it crystallized as Chalcedony-cryptocrystalline quartz. From this crystallization the ground water would have also been iron rich which would combine with quartz or other sulfides during the petrification process, and had made a rainbow color of sulfides or color on its own. Eventually this had caused the petrified wood to be buried by accumulation of different sediments or rich minerals depending on the condition of the environment. Petrified wood at this stage can rather range in several different elements that cause it to form it natural colors due to the concentration of different chemical elements.