Sapphire Crystal Window Sapphire windows are used in some non-ornamental applications, including infrared optical components, such as in scientific instruments; high-durability windows and movement bearings;Due to sapphire's remarkable hardness (third hardest mineral, right behind diamond and moissanite). Features of Sapphire Crystal 1. High-hardness - abrasion resistance 2. Transparency - in the range from ultraviolet to infrared light (0.15 - 5.5 �µm) 3. Chemical resistance and heat resistance - resist almost all kinds of acid and alkaline, heat up to 2000 �ºC. 4. Suitable for the application of insulation property required. Sapphire Crystal Property Crystal structure: Hexagonal Lattice: a=4.785�?, C=12.991�? Density: 3.98g/cm3 Transmission Range: 150-5500nm Melting Point: 2040�°C Specific Heat: 0.418 W.s/g/K Thermal Conductivity: 25.12 W/m/K Thermal Shock Resistance: 790 W/m Thermal Expansion Coefficient: 5.8x10E-6/K dn/dT: 13x10E-6/K @633nm Hardness: 9 Mohs Refractive Index: 1.83 @0.26mm, 1.76 @0.63mm, 1.58 @5.57m Sapphire Crystal Applications - UV and IR Optics - Windows for High Temperature and Pressure, Corrosion Resistance, Abrasion Resistance - Heat Sink and Thermocouplers; Semiconductor Wafer Carriers - Electrical Insulators - Thin Film Deposition - Transparent Electronic Substrate - Silicon on Sapphire Wafers; Superconductor Substrate Sapphire Crystal Window Specifications Diameter Tolerance(mm): +0.0/-0.2 (General), +0.0/-0.1 (High Precision) Thickness Tolerance(mm): �±0.2 (General), �±0.05 (High Precision) Clear Aperture: >75% (Small Size), >90% (Large Size) Parallelism: 3 min. (General), 10 sec. (High Precision) Surface Quality: 80/50 (General), 40/20 (High Precision) Flatness (per 25mm@633nm): �»(General), �»/4 (High Precision) Bevel (face width x 450 0)
QTY/WT: 533.08 cts Yellow topaz is a natural golden stone that has been prized for its beauty and symbolism for centuries. It ranges in color from yellow-brown to golden and can be found around the world. Yellow topaz jewelry is widely available and can often feature diamonds or other precious stones as accents.
QTY/WT: 964.23 cts Emerald is the bluish-green to green variety of beryl, a mineral species that includes aquamarine. A highly saturated green color defines high-quality emerald. Emerald cuts have concentric parallel rows of facets and beveled corners.
QTY/WT: 107.82 cts Citrine Gemstone Basic Properties Table Chemical Formula Silicon dioxide (SiO2) Color light yellow to dark yellow, gold-brown Hardness 7 on the Mohs scale Crystal System Hexagonal (trigonal); hexagonal prisms with pyramids Refractive Index 1.544 - 1.553 Transparency Transparent Cleavage None Fracture Conchoidal, very brittle
Padpardcha Gemstone 1.10 CT Natural Sri Lankan stone
All certified zodiac gems are available at their best prices depending upon their sizes, weights, and designs. They are also available with silver and gold rings.
We are Family owned small Business in Sri Lanka dealing in ceylon blue sapphires.we are a registered business under ceylon gem corporation. I have the following product in stock GRS Certified Royal Blue Sapphire 5.24Carats Origin - Ceylon Color -Royal Blue Total Weight: 5.24ct Cut - Brilliant Step 5 Shape - Cushion Treatment - Heated Measurement -10.84*8.68*5.32 Amazing Color and Luster Price : USD 4600 per Carat Video and Certificate Available on Request I can provide you with a copy of my business registration and gem dealers license in Sri Lanka in case you are interested. You are free to catch me up on Whatsapp +94702928640 Thanks & Regards Imran Hussain Shifanas Gem & Jewellery No.7/4A Mohideen Jumma Masjid Lane , Thalpitiya, Galle Sri Lanka
Royal blue color sapphire 4.24 crt Top and best quality With GIL certificate
The "Tanzani Ruby 74 carat natural with GRS certificate" is a remarkable and highly sought-after gemstone that holds exceptional value due to its rarity, size, origin, and certification. Here's a detailed elaboration of this exquisite gem: 1. Origin - Tanzanian Ruby: The gemstone originates from Tanzania, a country known for producing some of the world's most vivid and prized rubies. Tanzanian rubies are celebrated for their intense red hues, and they are highly regarded in the gemstone market. 2. Ruby Variety: Rubies are a variety of the mineral corundum, renowned for their vibrant red color. They are one of the most coveted gemstones and are often referred to as the "King of Gemstones" due to their rarity and stunning appearance. 3. Size - 74 Carats: The exceptional size of 74 carats is a rarity in the world of gemstones, especially for rubies. Large, high-quality rubies are extremely scarce, making this gem even more exceptional. Its substantial carat weight adds to its desirability and investment potential. 4. Natural Origin: The term "natural" signifies that the ruby has not undergone any treatments or enhancements to alter its color or clarity. Natural rubies are highly prized for their authenticity and untouched beauty. 5. GRS Certificate: The GemResearch Swisslab (GRS) is a highly reputable gemological laboratory known for its strict standards and expertise in evaluating gemstones. A GRS certificate adds tremendous credibility to the gemstone by confirming its authenticity, origin, and specific characteristics, including color and clarity. 6. Very Rare Size: The description "very rare size" underscores the exceptional nature of this ruby. Such large, high-quality rubies are indeed a scarcity in the market, and they are typically reserved for collectors, connoisseurs, and high-end jewelry designs. Value and Investment: A Tanzanian Ruby of this size, natural origin, and GRS certification is not only a breathtaking piece of nature's art but also a valuable investment. Its rarity, beauty, and certification ensure that it holds and potentially appreciates in value over time. In summary, the "Tanzani Ruby 74 carat natural with GRS certificate" is a remarkable gemstone that combines the allure of Tanzanian rubies with an exceptionally rare size, all backed by the credibility of a GRS certificate. It represents a unique and valuable addition to any gemstone collection or jewelry piece, making it a true treasure for those fortunate enough to possess it.
rough and cut top quality hackmanite from Badakhshan, Afghanistan
different qualities of rare Afghanite
supplying top quality rough and cut spinel from Kuh-e-lal and afghanistan
direct source of rough and cut Panjshir Emerald
high quality AAA+ lapis lazuli from Sar_e-Sang, Badakhshan, Afghanistan
Ruby Gemstone Natural Ruby Pigeon Blood Ruby 2.1ct Oval No Heating AIGS Certificate Ring Pendant Earth High And Customization Certificate YES Item Weight 2.1ct Main Stone Ruby Color Blood Red Certificate Type AIGS Origin MZ(Origin)
7.672ct Natural Green Emerald Loose Gemstone Emerald Gemstone Weight(carat): 7.672ct Emerald Gemstone Size: 12.38x10.81x7.42mm Emerald Gemstone Cut: Octagonal Cut minor to moderate. Emerald Country of Origin: Zambia Emerald Color: Green Emerald Clarity Level: VS NGSTC Certificate Online inspection supports ORDER 3 PIECES AND GET 5% OFF
Luxury Natural Tanzanite Loose Gemstone For jwelery GIA GRS Certificate Tanzania Violet Blue Stones Country of origin: Tanzania
Ethiopian Opal natural gemstone pear shape full fire 100% natural Ethiopian Pear shape Gemstone weight:approx.73.91ct Gemstone cutting: Cab Gemstone quality: Top Gemstone treatment: none
Natural Corundum Ceylon Ceylon Sapphire Blue/pink/Orange Sapphire /Ruby Blue Sapphire 0.85Crt Blue Sapphire 0.70Crt Blue Sapphire 0.65Crt Yellow Sapphire 0.80Crt Orange Sapphire 0.75Crt Pink Sapphire 0.55Crt Orange Sapphire 0.70Cr tBlue Sapphire 0.60Crt Blue Sapphire 0.55Crt Blue Sapphire 0.60Crt Blue Sapphire 0.40Crt Blue Sapphire 0.40Crt Pink Sapphire 0.50Crt Ruby 0.25Crt Orange Sapphire 0.35Crt Ruby Sapphire 0.20Crt Blue Sapphire 0.40Crt Blue Sapphire 0.40Crt Cut: Mixed Total Weight: 9.65ct� Price: usd 1500
Available 27 Tones Raw Sami precious stone, Name LAPAS LAZOULI ON j/Ali port Dubai.
