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An agate or ruby is a unit of typographical measure. It is 5.5 typographical points, or about 1 ⁄ 13 inch (1.94 mm). It can refer either to the height of a line of type or to a font that is 5.5 points. An agate font is commonly used to display statistical data or legal notices in newspapers.
Ruby is a pinkish-red-to-blood-red-colored gemstone, a variety of the mineral corundum (aluminium oxide). Ruby is one of the most popular traditional jewelry gems and is very durable. Other varieties of gem-quality corundum are called sapphires. Ruby is one of the traditional cardinal gems, alongside amethyst, sapphire, emerald, and diamond. [3]
Corundum is a crystalline form of aluminium oxide (Al 2 O 3) typically containing traces of iron, titanium, vanadium, and chromium. [3] [4] It is a rock-forming mineral.It is a naturally transparent material, but can have different colors depending on the presence of transition metal impurities in its crystalline structure. [7]
Ruby and Rose return to UNIT headquarters, where they use a "Time Window" in order to recreate the night Ruby was abandoned, entering it alongside UNIT colonel Chidozie. A hooded figure, believed to be Ruby's mother, points ambiguously at the Doctor, and as the figure disappears, a mysterious swirling vortex appears where Chidozie stood.
Ruby returns home and asks her mother, Carla, for help. Carla talks to the woman, but also flees, and disowns Ruby. A year later, Ruby has a meeting with Kate Lethbridge-Stewart of UNIT, who tells her the Doctor was never seen again after disappearing in Wales. Kate also comments on the increase of supernatural activity recently tracked by UNIT.
The traditional typographic units are based either on non-metric units, or on odd multiples (such as 35 ⁄ 83) of a metric unit.There are no specifically metric units for this particular purpose, although there is a DIN standard sometimes used in German publishing, which measures type sizes in multiples of 0.25 mm, and proponents of the metrication of typography generally recommend the use of ...
Painite is a very rare borate mineral.It was first found in Myanmar by British mineralogist and gem dealer Arthur C.D. Pain who misidentified it as ruby, until it was discovered as a new gemstone in the 1950s.
A ruby laser is a solid-state laser that uses a synthetic ruby crystal as its gain medium. The first working laser was a ruby laser made by Theodore H. "Ted" Maiman at Hughes Research Laboratories on May 16, 1960. [1] [2] Ruby lasers produce pulses of coherent visible light at a wavelength of 694.3 nm, which is a deep red color.