tombeads

1. The blue valuable color is its value target. An unusual deep color blue valuable possibly only sells a 100 HK dollars card, but good Che Ju blue treasure, then sells each card several thousand HK dollars.Ocean Agate Beads In the US and Europe, the people are partial compare the deep color the blue treasure. In Hong Kong, the consumer likes the medium depth the blue color, this color department's blue valuable selling price is high. Will be blue places remote valuable arm, observes carefully its color is the blue color or the black. If it is the blue color, although then your choice is also not far. 2. Looks at the gem in natural sunlight and under the man-made photo source. The gem will look like under the glare will compare the tint, but will compare under the common sunlight “black”. 3. Has a look at the color whether even consistent, the fissure will affect the gem artistic and the durable degree. If the feather figure extends to the stone surface, the hit suddenly (e.g. when will rub house sparrow) make the gem breakage. 4. Do not forget that observes the gem cutting and the proportion. 5. The sapphire and red is valuable same, the careful replica and several may seem real sham. the sapphire and the similar mineral may perform the correct difference through the respective mineral crystal characteristic. The valuable stone step benitoite only then an American habitat, the output are few, although the color and the sapphire are closer,Onyx beads but its degree of hardness is small, touches the degree of hardness is only 6-6.5, therefore only degree of hardness then with sapphire difference; The natural sapphire has the double refraction, but the spinel is a simple refraction, if in the blue color gem can present the red flash, then may conclude this blue color gem for the spinel or the black curtain stone; Sapphire high degree of hardness, the high density, the high refractive index may with the tourmaline, the cordierite, the black curtain stone distinguish.