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,
A Canterlot Wedding He also recommended "A Canterlot Wedding" to viewers who may be skeptical about the popularity of the series. David Hinckley of the "New York Daily News" noted that the complex storyline and darker themes seen in "A Canterlot Wedding" would make it appeal just as well to older viewers, and made the episode also feel relatively ambitious for a children's show. Hinckley and Michelle Profis of "Entertainment Weekly" noted that the episode's timing was also close to the one-year anniversary of the royal wedding of Prince William and Catherine Middleton. "Entertainment Weekly" writer Hilary Busis, reporting about the "invitation" that