(1) see: natural crystal in the forming process, often by environment affect total contain some impurities, to the sun, can see tiffany stores london light observed while even the tiny horizontal grain or LiuXu of substance. And false crystal machine to use more of crystal, glass melting slag, after polishing processing, shading counterfeit and become, not even stripes, and LiuXu of substance.

(2) : even if the licking in hot tiffany jewllery summer days, with the tongue lick natural crystal surface, also have cold and cool feeling. False, it's not cool feeling.

(3) lighting: natural crystal ornaments tiffany pearl earrings shaft in the sun, no matter from which Angle it, it can release the beautiful luster. False cannot.

(4) hardness: natural crystal tiffany jewellery hardness, with gravel in jewelry on a gently, won't leave a mark; If there is a fake, stripe.

(5) with polarisers check: in the next turn tiffany charms 360 degrees polarisers have siming four dark changes is the natural crystal ornaments, no change is false.

(6) with two color check: natural amethyst have two color sex, false no two color sex.

(7) use a magnifying glass check: ten times tiffany earrings with a magnifying glass in transmitted light, can find the check of the bubble can be basically as false.

(8) with hair will check: crystal ornaments on a human hair, the human eye can see through crystal across the double, it is natural, mainly tiffany ring because it has double refraction.

(9) with conductometer to detect: conductometer to adjust to the green 4 case testing of stones, natural crystal can rise to yellow 2 case, and false not tiffanys rise, when large area rose to a case when yellow.