Every finished gemstone begins with a series of decisions made before cutting starts. Discover how professional lapidaries evaluate natural rough gemstones, select the most suitable cutting orientation, manage inclusions and colour zoning, calculate potential yield and balance beauty against weight retention. A practical guide to the science and craftsmanship behind gemstone cutting.
Why does a gemstone cutter sometimes remove more than half the original rough? Discover how natural crystal shape, inclusions, colour zoning, optical physics and cutting proportions influence the transformation from rough gemstone to finished gem—and why a smaller stone can sometimes be significantly more valuable.
Successful sapphire faceting begins long before the first facet is cut. This professional guide explains how to assess natural sapphire rough for colour, crystal orientation, pleochroism, zoning, inclusions, fractures, usable yield and optical potential before committing valuable material to the lap.
