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Asterism on the surface of a blue star sapphire. A purple-pink star sapphire displaying asterism in a platinum ring.. An asterism (from Ancient Greek ἀστήρ (astḗr) 'star' and -ism) is a star-shaped concentration of light reflected or refracted from a gemstone.
The identification of taršīš as amber is supported by the description of the stone in Daniel 10:6 as luminous and warm-colored, coinciding with archaeological evidence of Baltic amber's presence in the ancient Levant during the relevant time period. Unlike other proposed identifications (such as chrysolite, topaz, or tiger's eye), amber was ...
Many Torah scholars, however, have opined that the biblical sapir was, in fact, lapis lazuli (see Exodus 24:10, lapis lazuli is a possible alternate rendering of "sapphire" the stone pavement under God's feet when the intention to craft the tablets of the covenant is disclosed Exodus 24:12). [2]
Citrine “A powerful gemstone crystal in a range of deep yellows, oranges, and yellow-cream-white, the citrine gemstone is said to bring abundance and wealth into one’s life,” Salzer says.
Due to its similar color, Couch originally believed it to be sapphire, a variety of corundum. In 1909, a sample was sent to the University of California, Berkeley, where mineralogist Dr. George D. Louderback realized it was a previously unknown mineral. Corundum (sapphire) has a defined Mohs hardness of 9, while benitoite is much softer.
Particolored sapphires (or bi-color sapphires) are those stones that exhibit two or more colors within a single stone. [8] The desirability of particolored or bi-color sapphires is usually judged based on the zoning or location of their colors, the colors' saturation, and the contrast of their colors. [ 9 ]
For instance, ruby comes in various colors such as pinkish-mauve and pigeon-blood red; sapphires exist in pink, multiple shades of blue, and a colorless variety. Medieval and early contemporary texts had trouble sorting one gem from another. The possibility of a gem being fake or misidentified limited the stone's medical use.
The ovoid table-cut sapphire weighs 104 carats (21 g). It is 4.9 cm (1 + 7 ⁄ 8 in) long, [5] and has one or two blemishes but was evidently deemed to be of high value by the Stuarts. At some point a hole was drilled at one end, probably to introduce an attachment by which the stone could be worn as a pendant. [1]