Hydrothermal stones are stones grown in laboratory conditions with observance of all necessary norms and rules, thanks to which the mineral completely repeats the features of natural crystals.
Hydrothermal minerals are not inferior in quality to natural crystals and even very often exceed them - they have great big brightness and purity. Also, by chemical, physical and optical properties hydrothermal stones are absolutely identical to natural stones. The main difference between hydrothermal stone and natural stone - is the cost of stone. Crystal grown in this manner emerald is a full analog of natural stone. The process of its growing takes about 4 weeks, and as a seed, beryl is used. Hydrothermal stone has the same hardness as natural, but it is more durable. This can be explained by the fact that in the lab created emerald there are no cracks that would contribute to its destruction.. Besides, such a mineral is resistant to high temperatures and acids.