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.
Better quality material, showing blue and green flashes, ranges from approximately $24 to $160 per carat, depending on the intensity and distribution of the colors. White opal in which the play of color includes red, violet or orange are in great demand and bring from $50 to $150 per carat.