age of empires is a series of historical real-time strategy video games, originally developed by ensemble studios and published by xbox game studios.the first game of the series was age of empires, released in 1997.seven other games and three spin-offs have been released. age of empires focused on events in europe, africa and asia, spanning from the stone age to the iron age; the expansion .
in large enough quantities in beach sands, rutile forms an important constituent of heavy minerals and ore deposits. miners extract and separate the valuable minerals – e.g., rutile, zircon, and ilmenite.the main uses for rutile are the manufacture of refractory ceramic, as a pigment, and for the production of titanium metal.. finely powdered rutile is a brilliant white pigment and is used .
perak's administration became more organised after the sultanate was established. in democratic malacca, government was based on the feudal system. with the opening up of perak in the 16th century, the state became a source of tin ore. it appears that anyone was free to trade in the commodity, although the tin trade did not attract significant .
topaz is a silicate mineral of aluminium and fluorine with the chemical formula al 2 si o 4 f, oh 2.topaz crystallizes in the orthorhombic system, and its crystals are mostly prismatic terminated by pyramidal and other faces. it is one of the hardest naturally occurring minerals mohs hardness of 8 and is the hardest of any silicate mineral.this hardness combined with its usual transparency .
rhodochrosite occurs as a hydrothermal vein mineral along with other manganese minerals in low temperature ore deposits as in the silver mines of romania where it was first found. banded rhodochrosite is mined in capillitas, argentina. it was first described in 1813 in reference to a sample from cavnic, maramureş, present-day romania .
apatite is occasionally found to contain significant amounts of rare-earth elements and can be used as an ore for those metals. this is preferable to traditional rare-earth ores such as monazite, as apatite is not very radioactive and does not pose an environmental hazard in mine tailings.
realgar, α-as 4 s 4, is an arsenic sulfide mineral, also known as 'ruby sulphur' or 'ruby of arsenic'. it is a soft, sectile mineral occurring in monoclinic crystals, or in granular, compact, or powdery form, often in association with the related mineral, orpiment as 2 s 3 .it is orange-red in color, melts at 320 c, and burns with a bluish flame releasing fumes of arsenic and sulfur.
one of its main cargos is iron ore from the shilu mine. hainan received 11,000 tons of products via ports november 2010, up 90.1 percent month-on-month. between january and november 2010, 102,000 tons of products were exported via hainan, 34,000 tons of which were exported to the us, and 14,000 tons sent to the eu. education
marimo also known as cladophora ball, moss ball, moss ball pets, or lake ball is a rare growth form of aegagropila linnaei a species of filamentous green algae in which the algae grow into large green balls with a velvety appearance.marimo are eukaryotic. the species can be found in a number of lakes and rivers in japan and northern europe. .
apatite is an ore mineral at the hoidas lake rare-earth project. the standard enthalpies of formation in the crystalline state of hydroxyapatite, chlorapatite and a preliminary value for bromapatite, have been determined by reaction-solution calorimetry. speculations on the existence of a possible fifth member of the calcium apatites family .
chalcopyrite is much softer than pyrite and can be scratched with a knife, whereas pyrite cannot be scratched by a knife. however, chalcopyrite is harder than gold, which, if pure, can be scratched by copper. chalcopyrite has a distinctive black streak with green flecks in it. pyrite has a black streak and gold has a yellow streak.