The thickness of rock crystal, you never see the bubbles.This feature can only be a glass.It frequently gas bubbles of different sizes.
Explore the subject for the presence of striae.So called inclusions which are cooled line, left current waterglass.Often, they are visible to the naked eye.They can be detected by examining the product in transmission.Most often they resemble fine threads, ribbons and knots with "tails".Sometimes they are almost invisible.To identify such streaks have to use special methods.For example, to inspect the object under the rays of polarized light.Streaks differ from the total weight of the glass of
the refractive index, density and color.In the crystal structure of rock crystal streaks can not be.
Before buying a crystal product, carefully inspect it.Look for various defects in the crystal.This may be cracked and clouding.Their presence indicates that the stone was created by nature, not by man.
Rhinestone, unlike glass, has a high thermal conductivity.Apply the product to her cheek.Glass objects immediately warms up.Crystal Stone will stay cold longer.Products with low thermal warmer to the touch than high.
Rhinestone, unlike glass, not scratch steel knife.If you have a steel knife, try a little scratch the product.Rather, the glass and steel succumb to surface scratches remain.Rhinestone in this procedure will remain in its original form.
If the thickness of the product is the same for the entire area, perform the following experiment.Look through it for every little thing.Glass tends to slightly increase the items.In particular there is a crystal.
Rhinestone can visually bifurcate items.For example, if you put a ball made of crystal on the edge of the paper, the edge will look forked.Glass ball does not give such an effect.