Kyanite is a typically blue silicate mineral, commonly found in aluminium rich metamorphic or sedimentary Rocks.Kyanite is a member of the alumino-silicate series, which includes the polymorphs, alusite and sillimanite, which have the same chemical composition (Al2O3.SiO2) as alusite and sillimanite but it is distinguished from those two minerals by its physical properties. Refractory Materials : Refractories are heat-resistant materials that constitute the linings for high-temperature furnaces and reactors and must be able to withstand high temperatures, mechanical wear, thermal shock and chemical corrosion. Kyanite is used in refractories sometimes in raw form and mostly in calcined form. 1. Raw kyanite: Kyanite has high expansion coefficient. Moreover, its calcination into mullite is also accompanied by a significant expansion in volume (20%). Raw kyanite as a refractory material is thus particularly beneficial when shrinkage from other materials and binders needs to be compensated for. 2. Calcined kyanite: Kyanite calcined to mullite is widely utilized in refractory products. Mullite exhibits excellent refractory properties like thermal stability (it is stable upto 1810 C), thermal shock resistance, creep resistance, and high hot strength and chemical corrosion resistance. Refractory bricks made from calcined kyanite possess outstanding: Higher modulus of rupture. Lower co-efficient of expansion. Increased firing range and temperature. Increased durability, about three times that of ordinary bricks. More resistance to salt attacks. Very low co-efficient of spalling. Kyanite refractories find application used in glass industry as well as various metallurigical industries (except steel metallurgy, as mullite refractory bricks are corroded by iron slag and are not highly resistant to metallic oxides). Kyanite has been a supplier of raw kyanite for many years. Our kyanite is high in purity, free from iron oxide, silica, bases and alkalis. These impurities considerably reduce the softening point of mullite and thus affect the refractory properties. kyanite is often associated with the mineral corundum. This is advantageous as it reduces the percentage of free silica when calcined. All in all. Specfications : Al203:- 35-52% Fe2o3:- 1-5%
based in Range northern area and we deal only Rough materials. We are dealing all kinds of Minerals Rocks, and Gemstons we are having our own 12 Mines in northern area our 80 products from our own mines and 20 we buy from another miners . We are exporting morethen 22 countries. We are specialist in Aquamarine specimen and crystal, Mica and Quartz in Bulk , Topaz, Diopside, black and Green Caped Tourmaline , Epidot, Sephen, Garnet, Amethyst, Petroliem Quartz, Feldspar, Emerald, Flourite, Routile Quartz , Petroleum Quartz etc. Note we deal only Rough materials
Cultured sea pearls jewelry fashion designed Fresh sea water pearl in the shell per box for necklace. Fresh sea Pearls without designed accessories. Advance Payments via Western Union money transfer or via money gram or bank wire transfer transaction for bulk orders Shipping amount per item from will. Be separate payments $40 00 per item
1mm rare size almandine crystals . Location afghanistan Quantity: 7kg 7kg.1mm size
zircon as a material for industrial ceramics, refractories (furnace or reactor lining materials that are resistant to high heat), to dyes. the use of zircon is developing in a number of industrial sectors, including: ceramic Industry, PSZ (Partially Stabilized Zirconia) glass industry, Zircon flour industry (micronized zircon), zirconium chemical industry, Refractory brick industry Printing sand industry. the use of micronized zircon or zircon powder in ceramic products accounts for almost half of the national consumption of this mineral. In the manufacture of ceramics, zircon flour serves as an opaque glaze for household items and ceramic tiles. Meanwhile, in the glass industry, zirconia (fused zircon) is used to produce glasses with special compositions, such as optical glass, fiber glass, color TV glass, and so on. In addition, the use of zircon is quite high in the metal industry. This mineral is used in the metal industry because it has heat-resistant properties. In practice, zircon flour is used to coat metal products, such as steel and bone iron, especially dry coating to produce kitchen and bathroom products. The use of zircon flour is also applied in the production of refractory bricks used to line steel or glass smelting furnaces. Zircon is also used in the nuclear sector. In this field, zircon is used as a cladding material for nuclear reactor fuel. As a coating material, zircon can withstand very high heat which is the result of fusion reactions in nuclear reactors.
Honing refers to a set of stones (sticks) assembled on the honing head put pressure on the work-Piece along the radial, and through rotating and moving back and forth for precision honing machine. When honing high hardness and toughness materials, the Diamond /CBN Efficiency of honing stone( stick) is 3-75 times higher than that of ordinary abrasive stone, and the honing efficiency of ordinary materials is also improved about 10 times. since Diamond/CBN honing stone (stick) wear is less, the shape retention is better, therefore, the higher honing accuracy and economic effect can be obtained. Diamond honing stick is used to process hard and brittle materials, such as honing high carbon steel, cast iron, cemented, carbide, etc. honing stick mainly used for honing high strength alloy steel, tool steel, stainless steel heat-resistant alloy steel. Customized is OK
In the gem world, all kinds of gem-quality corundum other than ruby are called sapphire. The mineral name of sapphire is corundum, which belongs to the corundum group of minerals. In fact, the gem-quality corundum in nature is called sapphire, or colored sapphire, except for red called ruby, and other colors such as blue, light blue, green, yellow, gray, colorless, etc. Sapphire is preceded by a color name, such as pink sapphire. The chemical composition of sapphire (Al2O3) is mainly Fe, Ti, and color. Corundum contains iron (Fe) and titanium (Ti) and other trace elements, and presents blue, sky blue, light blue and other colors, among which the royal blue and cornflower colors that are considered to be thick but not black are the best. In cabochon cutting, when the interior is rich in three groups of inclusions parallel to the bottom surface and oriented, it can produce beautiful six-shot starlight, which is called star sapphire The composition of sapphire is alumina, which is blue due to the trace elements titanium (Ti4) or iron (Fe2). It belongs to the trigonal crystal system, and the crystal form is often cylindrical, short column, plate, etc., and the geometry is mostly granular or dense block. Transparent to translucent, vitreous luster. The refractive index is 1.76-1.77, the birefringence is 0.008, and the dichroism is strong. Heterogeneous body. Sometimes it has a special optical effect - the star effect. The hardness is 9, and the density is 3.95-4.1 g/cm3. No cleavage, fissure development. Industrial sapphire is a material used in special vehicles as transparent armor, and with the exception of diamonds, sapphire is harder than any other natural material. Sapphire belongs to the trigonal crystal system and has a hexagonal structure. The lattice constants are: a=b=4.758A, c=12.991A Refractive index 1.762-1.770 Birefringence: 0.008- 0.010 Uniaxial crystal negative light, in some cases abnormal biaxial crystal light Luster: bright glass luster to adamantine luster Pleochroism: Colored sapphires have dichroism, generally, dark blue/blue, blue/light blue, blue-green, blue-gray, yellow sapphire has golden/yellow, orange/light yellow, light yellow/ Colorless, wait.
Iron Pyrite 48%,
Cut emerald Stones for Necklaces Bracelets Watch's and other jewellery items
Pink Himalayan salt. We have all kinds of Himalayan salt, lamps, stones etc
As for luminous gemstone, it is man-made gemstone, which is made from quartz (ceramic) and photoluminescent pigment. It can absorb light and glow in the dark for several hours. based on afterglow color, there is mainly yellow-green and blue-green color. we can provide diameter 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 20mm, 22mm. All above have a hole in the bead center. more bigger diameter, such as 30mm, 40mm, 50mm can also be produced, but there is no hole in the center. the price is different with various diameter . As usual, we provide the product with single bead, you can make a string bracelet yourself. If you want a bracelet directly, please inform us the diameter and how many beads you need in a string bracelet so that we can quote you. Please check the attached file for some of the products specification at first. if you have interest in such products, please inform us which diameter, what quantity and afterglow color you need so that we can quote you.
Natural Ruby - Gemstone Weight: 370.19ct Measurement: 55.00 x 28.20 x 23.40mm Cut: Rough Color: Red Shape: Rough Species: Corundum; Hardness - Nine; Crystal System - Trigonal, Specific Gravity - 4.00
pearls
We can supply Pearls and Gems: Our product range includes: 1. Full round Pearls 2. Emerald, Yellow Saphire, Ruby, Coral 3. Cats Eye, Blue Saphire, Hessonite.
Real Brazilian Emeralds, small to big all sizes available. Rough gems.
Contact Us to Get High Quality Original Ceylon Blue Sapphire and all Kind of Gem Stones
We have two natural cut jewels emeralds pieces. 1.The big one is (5.67 carats). 2.The small one is (2.01 carats). The both natural pieces have the IGI Certificates.
We are operating Gem mining in Sri Lanka . And we have own sapphires. For more inquiries contact us !
Garnet
Handicraft SUPPLIER from Vietnam Material: Natural Seagrass, Bamboo, Water Hyacinth and Rattan (CLICK HERE ) Made in: Viet Nam Shape: by design Color: costumer order
