I've dug up a couple of other materials - see below:
Silestone is artificial or reconstituted Quartz and pigments held
together with a polymer or resin binder. Silestone is a 93% pure quartz
material mixed with colour pigments and resins which are compressed in
a vacuum to produce a hardwearing material perfect for kitchen
worktops. Available in 24 colours, it owes its' popularity, in part, to
its resistance to staining and scorching, low maintenance and hygienic
properties. http://www.silestone.com/uk/microban.htm
Zodiaq is artificial or reconstituted Quartz and pigments held together
with a polymer or resin binder. This results in a highly stain
resistant, heat resistant and scratch resistant surface. They are
available in a variety of different colours, some of which have tiny,
highly reflective chips which gives a sparkling effect. – Zodiaq is
DuPont's exciting new surfacing material. It is exceptionally strong
with sparkling beauty, radiance and a large choice of colours. It is
made from 96% Quartz and 4% polymer binder resulting in a versatile
material ideal for kitchen worktops. It is very hard, easy to maintain
and available in 22 beautiful colours