Synthetic Colored Gemstone White Sapphire gem for jewelry Free-Size Cutting

1.Optical Properties
White Sapphire gem exhibits exceptional optical characteristics:

· Maintains superior transmittance across an ultra-broad spectral range (200-5500nm), with >90% transmittance in the visible spectrum (380-780nm) and >85% in UV range (200-380nm)

· Features high refractive index (1.76-1.77 @589nm) and dispersion value (0.018), producing more intense fire than common synthetic spinel

· Demonstrates complete fluorescence inertness under both long-wave (365nm) and short-wave (254nm) UV radiation

· Extremely low birefringence (0.008) ensures ghosting-free imaging, making it ideal for precision optical components

2.Physical Properties
White Sapphire gem possesses outstanding physical parameters:

· Mohs hardness 9 (second only to diamond), Vickers hardness 2200-2300kg/mm² (10× harder than standard glass)

· Density 3.98g/cm³, identical to natural sapphire with premium tactile quality

· Anisotropic thermal expansion: 5.3×10⁻⁶/K (parallel to c-axis), 4.8×10⁻⁶/K (perpendicular to c-axis)

· Melting point up to 2053℃, thermal conductivity 35W/(m·K), stable long-term operation at 800℃

· Exceptional chemical inertness (resistant to all acids except HF), suitable for harsh environments

3.Machining Characteristics

White Sapphire gem offers superior processability:

· Ultra-thin cutting capability (0.1mm thickness with ±0.005mm tolerance) for miniaturized devices

· Supports multi-angle faceting (minimum edge angle 30°) for complex cut designs

· Polishable to optical-grade surface finish (Ra<1nm), achieving λ/10 flatness @633nm

· Laser engraving capability (50μm precision) for anti-counterfeit markings without affecting transmittance

· Special forming processes enable curved surfaces with minimum 5mm bending radius

4.Quality Assurance
White Sapphire gem adheres to stringent quality standards:

· Internally flawless (IF clarity grade) with no visible inclusions

· 100% manual inspection ensures absence of growth striations or bubbles

· Batch-wise XRD testing guarantees crystal structure integrity

· Comprehensive test reports document all critical performance parameters