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A lapidary is a text in verse or prose, often a whole book, that describes the physical properties and metaphysical virtues of precious and semi-precious stones, that is to say, a work on gemology. [1] It was frequently used as a medical textbook, since it also includes practical information about the supposed medical application of each stone ...
Crystal healing is a pseudoscientific alternative-medicine practice that uses semiprecious stones and crystals such as quartz, agate, amethyst or opal. Despite the common use of the term "crystal", many popular stones used in crystal healing, such as obsidian, are not technically crystals. Adherents of the practice claim that these have healing ...
Gemstone irradiation is a process in which a gemstone is exposed to artificial radiation in order to enhance its optical properties.High levels of ionizing radiation can change the atomic structure of the gemstone's crystal lattice, which in turn alters the optical properties within it. [1]
A variety of impurities and structural imperfections cause different colors in diamonds, including yellow, pink, blue, red, green, brown, and other hues. There is also a kind of pebble containing polycrystalline diamond that is black or gray, called carbonado, which may be of extraterrestrial origin.
Blue diamonds comprise only about 0.02 percent of mined diamonds but include some of the world's most famous jewels. Diamonds are a crystalline form of pure carbon, forming under enormous heat and ...
The diamond is classified as a Type IIb "fancy blue" diamond, and was graded by the Gemological Institute of America (GIA) as "Very, Very Slightly Included", or VVS2. The stone was unveiled in April 2019, and is the largest ever blue diamond found in the country. [3] The stone is anticipated to be sold in November 2019.
The flowers commonly called black roses do not really exist in said color, instead they actually have a dark shade, such as the "Black Magic", "Barkarole", "Black Beauty" and "Baccara" varieties. They can be artificially colored as well. [1] [2] In the language of flowers, roses have many different meanings. Black roses symbolize ideas such as ...
This makes it difficult to determine the identity of the stone intended in the original text, if a particular type was intended at all. Epiphanius mentions that "there is an iaspis, the so-called ancient, which is like snow or sea foam". This fits blue chalcedony, a highly prized gemstone in the Ancient Near East.