Gemstone characteristic that lends value to a gemstone. Apart from jewelry, from earliest antiquity engraved gems and hardstone carvings, such as cups, were major luxury art forms. A gem maker is called a lapidary or gemcutter; a diamond cutter is called a diamantaire. The traditional classification in the West, which goes back to the ancient Greeks, begins with a distinction between "precious" and "semi-precious"; similar distinctions are made in other cultures. In modern use the precious stones are diamond, ruby, sapphire and emerald, with all other gemstones being semi-precious. This distinction reflects the rarity of the respective stones in ancient times,
The One with Ross's Wedding for seasons to come". The authors of "Friends Like Us: The Unofficial Guide to Friends" state there are "too many 'best moments' to list in detail", but single out Rachel describing the perfect wedding to Ross, and Sarah Ferguson's cameo (though they call Branson's "embarrassing"). Following the broadcast of the episode in the UK, "The Independent" was critical, saying "Twice the length of a normal episode, last night's offering was approximately half as funny" and suggested the cast were behaving out of character. David Schwimmer has expressed dissatisfaction that Ross was married again, saying it was "a mistake" and that