Rose quartz color
The mineral will bleach when heated above 500☌, but will not regain its color when irradiated. That mineral makes up only about 0.05% - 0.15% of the overall weight of rose quartz. The nature of the colorizing agent in rose quartz has recently been studied by Goreva, Ma and Rossman (2001), following the more "direct" approach that was already chosen by Applin and Hicks: they dissolved rose quartz from various locations in hydrofluoric acid and extracted mats of a fibrous, rose-colored mineral that is related, but apparently not identical to dumortierite. This first sounds like an odd suggestion, as dumortierite is often deeply blue (even the color of its streak), but there are pink variants. More recently it has been suggested by Applin and Hicks (1987) that fibrous inclusions of the mineral dumortierite (Al,Fe) 7 are responsible for the haze and color of rose quartz. On the other hand there are reports of rose quartz from certain locations (Brazil) fading when exposed to sunlight, which supports the presence of color centers. It is therefore unlikely that the color is caused by irradiation induced color centers. Irradiation (both natural or artificial) of rose quartz can lead to the formation of additional smoky quartz centers and according alterations in color. Heated rose quartz will not regain its color upon irradiation. The color indeed disappears upon heating rose quartz, but at temperatures above 500☌, much higher than the temperatures required to bleach amethyst, certain citrines and smoky quartz, which do have irradiation induced color centers. Other proposals included the presence of irradiation induced color centers, similar to amethyst or smoky quartz, either in included minerals, or in the quartz substance itself. For the past 30-40 years it was assumed that rutile TiO 2 inclusions are the cause. The debate about the cause of the color is slowly settling, although there are still a few open questions. Rose quartz is usually very evenly colored. The color can vary from a very bright pink to almost purple. Quartz crystals of a similar color are called pink quartz. Rose quartz is used as an ornamental stone or as decoration and is one of the most popular semiprecious gem stones. pink quartz develops crystals while rose quartz does not. both varieties form in different environments, and pink quartz is sensitive to light, while rose quartz is not the cause of their color is not the same,
Despite being macrocrystalline varieties of similar color, rose quartz and pink quartz should be treated as different varieties as: The pink variety of quartz that forms crystals is called pink quartz and is covered in its own section. Rose quartz can be grainy, but the material used for lapidary purposes is built more homogeneously, like the specimen of unknown origin to the right. It is not a cryptocrystalline variety, however, as it is made up of many intergrown crystal subindividuals. It is never transparent, and it does not form crystal faces or crystals. Rose quartz is a pink variety of quartz that occurs in large translucent masses.