Sneakers

Gemstones

The traditional classification in the West, which goes back to the Ancient Greeks, begins with a distinction between precious and semi-precious stones; similar distinctions are made in other cultures. The precious stones are diamond, ruby, emerald and sapphire, with all other gemstones being semi-precious.
This distinction is unscientific and reflects the rarity of the respective stones [...] http://bit.ly/90WC10

posted by Eugen @ 4:59 PM