Developing this theme, a recent theoretical literature on urban growth con-trols abstracts from the market failures considered above and portraysgrowth-control policies as a way for landowners to raise their incomes (andperhaps their quality of life) at the expense of renters.
Origin: Brazil. Price per carat: $2,000.00. Enhancement code-N No evidence of heat or other enhancement. Example. Natural Imperial Topaz. Carat Weight: 14.9ct.
Huge, transparent, gem-quality crystals are found there. Topaz has also come from the Ural Mountains of Russia, Mexico and the U.S. (Texas, Colorado and Utah). Topaz is often confused with the less valuable citrine. Topaz is a very hard gemstone but it can be split with a single blow, a trait it shares with diamond. Any Topaz labeled with a prefix name (such as Gold Topaz, Madeira Topaz, False Topaz, Brazilian Topaz, Bahia Topaz, and Citrine Topaz) is heat-treated Citrine.