Rose Quartz.—This form of quartz, the color of which is indicated by its name, is rarely of sufficient transparency to be prized as a gem. Cut, however, into various ornaments, it makes objects of considerable beauty. Its luster, instead of being glassy like that of other forms of quartz, is nearly always more or less greasy. The ingredient which gives its color is not known. It is probably some organic matter, since the color disappears on heating and, unfortunately for the extended use of the stone, fades considerably on exposure to light. There are numerous localities whence rose quartz of good color may be obtained, although it is not of so common occurrence as most other varieties of quartz. The best rose quartz in this country comes from Oxford County, Maine, and the Black Hills. Foreign localities are the Urals, Brazil and Ceylon. Smoky Quartz.—This variety of quartz is often known as “smoky topaz,” a misleading term, since the mineral is not topaz at all. As its name implies, its color is like that of smoked glass, all gradations occurring between a mere tinge to color so dark as to render the mineral practically opaque. The color often varies considerably in the same crystal, being darker and lighter in spots. The coloring matter is undoubtedly carbonaceous and organic in nature, for when a crystal is heated it gives off a smell of burning organic matter, and by heating for some length of time the coloring may be entirely burned out. At an intermediate stage in such heating the color becomes brown or yellow, and stones of this color are often cut as gems and known by the name of “Spanish topaz” or “citrine.” True citrine is, however, transparent quartz with a natural yellow color. The most remarkable crystals of smoky quartz known are some that were found in 1868 in a hollow in granite in a locality in the Canton Uri, Switzerland. About 3,000 pounds of well formed crystals were there found, the largest and best of which are preserved in the Berne Museum. They are so unique that special names have been given them. One about two and one-half feet long, and weighing nearly four hundred pounds, is known as the “Grandfather”; another, somewhat smaller, but more perfect in form, as the “King,” and two of nearly equal size, weighing about one hundred and forty pounds each, are called “Castor and Pollux.” The smaller crystals obtained from this and neighboring regions in the Alps are for the most part of great perfection of form and color. Aside from these localities in the Alps, the most remarkable crystals of smoky quartz come from the region of Pike’s Peak, in our own country. While not reaching the size of the Alpine crystals, they are often perfect in form and color, and gems to the value of thousands of dollars are annually cut from the supply there obtained. Alexander County, North Carolina, also furnishes many crystals. Smoky quartz may be called the national stone of Scotland, the