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,
45th Battalion (Australia) The 45th Battalion was re-raised on 1 April 1948 under the command of Lieutenant Colonel Paul Cullen. Once again it was assigned to the 2nd Division, but was attached at brigade level to the 14th Brigade. During this time it also took on the role of a machine-gun battalion. Due to its links with Sydney, the newly raised 45th Battalion was closely associated with the disbanded 2/1st Battalion, a Second Australian Imperial Force unit, from where a large majority of the 45th Battalion's officers were drawn following the war. The battalion's regimental march, "Men of Harlech" was authorised in 1953.