Dispersion value of crystal

- Aug 19, 2019-

Dispersion value: 0.013.Dispersion means that the refractive index of a gem varies with the illumination.For example, the refraction of diamonds to red light is 2.405;2.427 for green light;Violet light was 2.449.

Shipment :


UPS,FEDEX,DHL ,EMS,TNT ,etc . Express is fast and covenient for customers ,we are happy to calculate shipping cost for you ,but customs charge is paid by yourself ,and sorry we don't know how much it is ,different country is different policy .


this way is some cheaper than express , but it is better than items more than 300KG ,and we are afraid customs charge is high .Besides ,customer should collect items from airport .

3. Ocean shipping

this way is the cheapest , but it is just good for big size carton and heavy weight , because custom clearance is high cost . And ocean shipping take a long time , it is 30 days usually .