"They come in all colours and different levels of sparkle. Fashions come
and go, but the current gem to be seen wearing is the Zublic, a colourless
stone that is totally reflective. It is very easily mimicked but only the
real stone is non irritant to body, so those who are status conscious have
them sewn into their skin."
These items carry a very large price, and hence a high profit per unit. They are quite rare, however - it is highly unlikely that a starport will have enough gemstones to fill a large Trader.