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Triple empty (white) stars on a transparent background, for use with star ratings. Two empty (white) star on a transparent background, for use with star ratings: Date: 3 April 2009, 19:53 (UTC) Source: Empty_Star.svg; White_Stars_2.svg; Author: Empty_Star.svg: Kbolino; White_Stars_2.svg: *Empty_Star.svg: Kbolino; derivative work: Pixeltoo (talk ...
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The star-effect may be also caused by the inclusions of hematite. In black star sapphire hematite needles formed parallel to the faces of the second order prism produce asterism. Some star sapphires from Thailand contain both hematite and rutile needles forming a 12-ray star. [3] Star-stones were formerly regarded with much superstition. [1]
Small rutile needles present in gems are responsible for an optical phenomenon known as asterism. Asteriated gems are known as "star" gems. Star sapphires, star rubies, and other star gems are highly sought after and are generally more valuable than their normal counterparts. Rutile is widely used as a welding electrode covering.
Size of this PNG preview of this SVG file: 300 × 300 pixels. ... European stars watermark.svg . This W3C-unspecified vector image was created with Inkscape.
The following is a list of stars with resolved images, that is, stars whose images have been resolved beyond a point source. Aside from the Sun , observed from Earth , stars are exceedingly small in apparent size, requiring the use of special high-resolution equipment and techniques to image.
The Pleiades (/ ˈ p l iː. ə d iː z, ˈ p l eɪ-, ˈ p l aɪ-/), [8] [9] also known as Seven Sisters and Messier 45 (M45), is an asterism of an open star cluster containing young B-type stars in the northwest of the constellation Taurus.
Enneagram, a nine-pointed star polygon; Decagram, a ten-pointed star polygon; Hendecagram, an eleven-pointed star polygon; Dodecagram, a twelve-pointed star polygon; Magic star, a star polygon in which numbers can be placed at each of the vertices and intersections, such that the four numbers on each line sum to the same "magic" constant