What’s the difference between grinding gemstones commercially and by hand?
With commercial grinding, the grinding technique used for most jewellery stones sold in the general trade, the main emphasis is on the speed of the operation. Commercial grinding is carried out in large factories, usually under poor working conditions, and the stones that come out of these factories do not sparkle as well as they could.
In contrast, when hand-cutting, a master craftsman measures the optical properties of the stone precisely before starting and creates a personalised design for each stone. If the stone is in proportion, and the facets are exactly the same size and at the right angle, the light will reflect off the stone correctly and the stone will shine from all sides.