Malachite sentence example
In its vivid blue colour it contrasts strikingly with the emerald-green malachite, also a basic copper carbonate, but containing rather more water and less carbon dioxide.
Azurite occurs with malachite in the upper portions of deposits of copper ore, and owes its origin to the alteration of the sulphide or of native copper by water containing carbon dioxide and oxygen.
Occasionally the massive material is cut and polished for decorative purposes, though the application in this direction is far less extensive than that of malachite.
Lastly, from the Altai region, as well as from the Nerchinsk Mountains, precious stones, such as jasper, malachite, beryl, dark quartz, and the like, are exported.
Many are found as minerals, the more important of such naturally occurring carbonates being cerussite (lead carbonate, PbC03), malachite and azurite (both basic copper carbonates), calamine (zinc carbonate, ZnCO 3), witherite (barium carbonate, BaCO 3), strontianite (strontium carbonate, SrC03), calcite (calcium carbonate, CaC03), dolomite (calcium magnesium carbonate, CaCO 3 MgCO 3), and sodium carbonate, Na 2 CO 3.Advertisement
Diamonds are obtained in Borneo, garnets in Sumatra, Bachian and Timor, and topazes in Bachian, antimony in Borneo and the Philippines; lead in Sumatra, Borneo and the Philippines; copper and malachite in the Philippines, Timor, Borneo and Sumatra; and, most important of all, tin in Banka, Billiton and Singkep. Iron is pretty frequent in various forms. Gold is not uncommon in the older ranges of Sumatra, Banka, Celebes, Bachian, Timor and Borneo.
It is a constituent of the minerals cerussite, malachite, azurite, spathic iron ore, calamine, strontianite, witherite, calcite aragonite, limestone, &c. It may be prepared by burning carbon in excess of air or oxygen, by the direct decomposition of many carbonates by heat, and by the decomposition of carbonates with mineral acids, M2C03+2HC1=2MCl-FH 2 O+CO 2.
The Devonian sandstones contain malachite ores near Kielce, and copper has been worked there since the 15th century, though the mines are now neglected.
The principal ores of copper are the oxides cuprite and melaconite, the carbonates malachite and chessylite, the basic chloride atacamite, the silicate chrysocolla, the sulphides chalcocite, chalcopyrite, erubescite and tetrahedrite.
Malachite is a valuable ore containing about 56% of the metal; it is obtained in very large quantities from South Australia, Siberia and other localities.Advertisement
Frequently intermixed with the green malachite is the blue carbonate chessylite or azurite, an ore containing when pure 55.16% of the metal.
Copper carbonates are of wide occurrence in the mineral kingdom, and constitute the valuable ores malachite and azurite.
Copper rust has the same composition as malachite; it results from the action of carbon dioxide and water on the metal.
These mountains are still the chief source of copper, but the ores, chiefly cuprite, malachite and chrysocolla, are also found in various parts of the Piedmont region.
Many semi-precious and precious stones are found in Utah, including garnet (long sold to tourists by the Navaho Indians), amethyst, jasper, topaz, tourmaline, opal, variscite (or " Utahlite "), malachite, diopside and Smithsonite.Advertisement
Volcanic activity in the neighbourhood is further shown by the quantities of pumice-stone drifted on to the south coasts of Kandavu and Viti Levu; malachite, antimony and graphite, gold in small quantities, and specular iron-sand occur.
Minerals which were not mined commercially in 1902 include asbestos, which occurs in Spartanburg and Pickens counties; fullers'-earth; graphite in Spartanburg and Greenville counties; iron ores in the north and north-west portions of the state; iron pyrites in Spartanburg and York counties; talc, bismuth, ochre, pyrites, ' galena, brown coal, malachite, phosphate of lead and barytes.
Vertical and horizontal veins of green malachite and blue azurite are still visible in the Great Orme Mines.
At the moment we're asking people to keep an eye out for the scarlet malachite beetle.
However, we specialize in jewelry from Chile made using lapis lazuli and malachite.Advertisement
Following the take-over of Gray's in 1960, Susan used the malachite transfers to create a sumptuous range of richly guilded ornamental pieces.
Delivered boxed and wrapped with ribbons. £ 10.99 malachite Topaz Handmade Necklace Beautiful, malachite tigertail necklace.
The copper mineral malachite is often used as a semi precious stone in jewelry.
Feeding around the water's edge were several heron species, malachite kingfisher and waders including redshank, spotted redshank, marsh sandpiper.
Feeding around the water 's edge were several heron species, malachite kingfisher and waders including redshank, spotted redshank, marsh sandpiper.Advertisement
If you like blue, be sure to check out the azurite malachite collection.
They mixed, pressed and broke down precious copper based minerals, such as malachite, along with carbon and manganese oxides to create colored powders used for face powders or eye colors.
It is crafted in sterling silver and has gemstones such as tiger's eye, red jasper and malachite.
Being less hydrated than malachite it is itself liable to alteration into this mineral, and pseudomorphs of malachite after azurite are not uncommon.