Loose nano crystal Blue Sapphire #121 Color Rectangle Shape Princess Cut 7x5mm gemstones wholesale from china supplier and manufacturer.
Rectangle shape gemstones:
Usually rectangular cut gemstones is with straight cornner, this loose gemstones cut demonstrates a classic elegance. Fully faceted for maximum brilliance, unlike the traditional step cut that are very transparent.
Sapphire Blue Color is one of most popular color gemstones for jewelry setting, if you do the wax casting, And wanna a cheaper price than Corundum Lab Blue sapphire Stones , then Nano Blue sapphire Color Gemstones is the best Choice , as it's heat resistant, withstand a high temperature.
There're other popular Blue Sapphire color stones options:
What is Nano Gemstones ?
A: Nano Crystal gemstone - is the glass-ceramic material with nano sized (10⁻⁹m) crystals of Spinel in an aluminosilicate glass matrix, which is not special glass and it is not synthetic crystal or mineral - it is their hybrid. This composite material has unique physical and optical properties: Color (homogeneous and even), Density (3-3.3g/cm³), Luster (RI=1.61-1.64); Melting temperature (more than 1650 C°) and high thermal shock resistance make this material ideally compatible with the wax-casting technology.
Nano Crystal gemstone are a new type of created gemstone made especially for jewellery. The colour is homogeneous, meaning that if you bought 100 emerald green nano crystal stones, the colour would be exactly the same in every stone. The material has been created with precious metal clay in mind, so any size gem should be kiln safe and blow torch safe with out colour change or damage.
Nano Crystal gemstone does not contain any health hazardous contaminants (lead, arsenum, cadmium) Hardness: 7 on Mohs scale
Refractive Index: 1.65-1.7
Specific Gravity: 3.5-4
Melting Point: 1700 degrees Celcius It does not change color when heated. Can be used in wax casting.
The Main characteristics of Nanosital/Nano Crystal stones:
1.Nano Stone's specific gravity index is very close to that of the most valuable gemstones such as topaz, sapphire, ruby and aquamarine.
2.Nano Stone and the optical properties of the most popular color gemstones are almost similar. Nano Stone's main feature is its lack of an unnaturally strong lustre, which is typical of cubic zirconia, wherein the play of colors remains attractive.
3.Nano Stone's hardness (7 on Mohs scale) guarantees jewellery durability without the loss of its original look. The Nanosital hardness index (7) is higher than glass (5), but lower than one of the hardest materials – corundum (9).
4.Its high melting point allows the use of any colored Nano Stone in lost-wax casting.
5.Color and transparency. Its wide color range, full correspondence to natural analogue, perfect optical properties, total transparency, and absence of inner defects makes Nano Stone one of the best, readily available rough jewellery material on the market.
Click the following Color Chart and Shapes & Size Chart to learn More.
- Factory & Manufacturer since 2008, strong productive ability.
- Ensure the large quantity supply of product.
- We are one of the largest manufacturers & Suppliers of Loose gemstone in Wuzhou City.
- Strict quality inspection:
- 15 production processes ; 9 inspection processes ; more than 8 experienced QC check ;
- Every gemstone has its quality assurance.
- 30 days return Policy without using and damage of the stones;
- Bulk product quality is not same as samples;
- Merchandise are not same as the order list;
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