Mahenge spinel is a stunning gem that is found from the Mahenge region of Tanzania in East Africa. The stone has a rich, deep red color and is known for its exceptional clarity. Mahenge spinel is relatively rare, making it a sought-after gem by collectors. The stone is also durable, making it ideal for use in jewelry making
Coloured gems, sri lankan yellow and blue sapphires, madagascan sapphires and mozambique rubies, mahenge spinel.Shipping
Tajikistan clean facet grade pink spinel 2-10 carat
Gemstone Information Variety : Spinel Color : Violet Weight : 1.17 Ct Dimension : 6.50mm*5.25mm*4.30mm Shape : Oval Cut : Mixed Cut Origin: Sri Lanka (Ceylon) Clarity : FL - Flawless Treatment : Not Enhanced Reference No : 1269 Shipping : Free Registered Air Mail Shipping Policy After your payment has cleared, your item(s) will be shipped out within 1-3 working days. Shipping Charges depend on each case and are clearly mentioned in the Ebay listings. The following shipping options are available: Registered Air Mail (Insured, Traceable) : Free (Takes 10-30 days) EMS Express Mail (Insured, Traceable): 80 USD (Takes 8-20 days) Import duties, taxes and charges are not included in the item price or shipping charges. These charges are buyers responsibility and check your country's custom office to determine additional costs prior to buying. Return Policy Returns accepted within 30 days after receiving the item. After receiving the item buyer should contact within 14 Days. Full Refund will be given as money back. Contact Information If you have any questions, concerns or inquiries about this item or any other item listed on Ebay, please contact our support team through the Ebay messaging system. We answer all messages within 24 hours, usually earlier.
Spinel Origin: Mahenge, Tanzania Colour: Hot Pink Carat Weight: 1.43 cts Clarity:SI Cut:Cushion Measurement:8.45mm X 6.18mm X 3.83mm Status: Available DM for Price
Spinel Origin: Mahenge, Tanzania Colour: Purplish Pink Carat Weight: 1.55 cts Clarity: VS Cut: Cushion Measurement: 7.68mm X 6.97mm X 4.01mm Status: Available Dm for Price
Spinel Origin: Mahenge,Tanzania Colour: Intense Pink. Carat weight: 2.10 cts Clarity: SI Measurement: 8.86mm X 6.40mm X 5.09mm Status:Available Dm for Price
Magnesia Bricks Description Magnesia Bricks are alkaline refractory materials. These products have over 90% magnesium oxide content and adopt periclase as the principal crystalline phase. Magnesia Bricks can be divided into two categories of Burnt Magnesia Bricks and Chemical Bonded Magnesite Brick. They have excellent performance of superior high temperature mechanical strength and volume stability. Magnesia Bricks can service in the high temperature of 1750.. They are ideal products for glass furnace application. Magnesia Bricks Features: It is a kind of alkaline refractory product with periclase as main phase magnesite-alumina spinel clinker as basic material. the product has such characteristics as good temperature vibration, good strength and volume stability in high temperature. Magnesia Bricks Application Basic open-hearth furnace for steelmaking Electric furnace bottom and wall Permanent lining of oxygen converter Non-ferrous metal metallurgy furnace Hyperthermia tunnel kiln Lining of rotary cement kiln Heating furnace bottom and wall Regenerative chamber of glass furnace Magnesia Bricks Properties High Refractoriness Good alkaline slag erosion resistance High apparent initial softening temperature Good thermal conductivity High thermal expansion Magnesia Bricks Manufacturing Process Burnt Magnesia Bricks are manufactured with magnesite clinker as the raw material and fired in the high temperature of 1550~1600 after smashing, burdening, mulling and molding. High-purity products can be fired in the temperature that over 1750. Chemical bonded magnesite brick is produced with certain chemical bonding through mixing, molding and drying.
Spinel (Mg(AlO2)2)(CAS:1302-67-6)
Summary Spinel is a rare mineral in nature, and it must be made by artificial synthesis. According to a certain proportion of raw materials, mixing pressing ball molding (to join the right amount of pulp). The characteristics of electric furnace melting temperature, in the smelting process, to maintain the redox state, avoid Fe2O3 FeO oxidation, to prevent the emergence of elemental Fe, after natural cooling of the hercynite sand. The uniform large crystal (95%) with no grain boundary was revealed under the microscope, which was similar to that of the glassy state. After processing into the iron aluminum spinel brick, mainly used in large-scale cement rotary kiln, instead of the current cement kiln used chrome brick, no Cr6+ pollution. Extended lining service life (magnesia chrome brick 10-12 months and hercynite brick 17-18 months), greatly reducing the consumption of refractory material and manpower, reduces the production cost, the full realization of the cement kiln chrome free production, solve the chromium pollution. Fe Al spinel represents a new generation of high performance chrome free refractories for cement rotary kiln. The two main methods for the synthesis of spinel are sintering and electric melting. Most spinel material is made from high purity synthetic alumina and chemical grade magnesium oxide, namely in shaft kiln sintering and fused in arc furnace. Al Mg spinel is a kind of aluminum magnesium oxide, its main component is alumina and Magnesium Oxide. Al Mg spinel has two kinds of natural formation and artificial synthesis. Natural magnesia spinel rarely found industrial applications of magnesium aluminum spinel are all artificial synthesis, the two main methods of synthetic magnesia alumina spinel is sintering and electric melting method. etc. Spinel application Sintered magnesia alumina spinel is used for cement rotary kiln, which not only avoids chromium pollution, but also has good resistance to spalling. Sintered magnesia alumina spinel is used for making ladle pouring material, which can greatly improve the anti erosion ability of steel sheet lining. The preparation of high quality synthetic spinel provides a new raw material for the production of amorphous and amorphous high purity refractory materials. Electric melting magnesium aluminum spinel is manufacturing plate, nozzle brick, open hearth brick material. The high temperature mechanical properties of aluminum and magnesium spinel products are good, which are the basic raw materials of the filter belt, refractory casting material and high. Fused magnesia alumina spinel used in iron and steel smelting and glass industry furnace.
Spinel Gemstones.
Spinel gemstones.
Spinel Gemstones.
Spinel Gemstones.
Spinel gemstones.
Spinel Gemstones.
Red spinel.
We have Facet Grade Afghanistan Natural Spinel, Red, Pink, Blue and Purple
Gemstone sri lanakan spinels.Exporting
Spinel gemstones.
