BRAZILIAN RUTILATED QUARTZ
A large piece of polished Brazilian Rutilated Smoky Quartz. An unusual double terminated crystal full of thin “angel hair” rutile, along with another white mineral, perhaps calcite or albite. Many of the rutile inclusions in this crystal are curved which is quite lovely too. There are a few dings on this crystal, which is full of character. A one-of-a-kind, large specimen of smoky quartz with rutile.
Minas Gerais, Brazil.
12cm x 6cm x 4cm, 420g.
Quartz has been known and appreciated since pre-historic times. The most ancient name known is recorded by Theophrastus in about 300-325 BCE as kristallos. The varietal names, rock crystal and bergcrystal, preserve the ancient usage. The root words signifying “ice cold” and “to contract” (or solidify) suggest the ancient belief that kristallos was permanently solidified ice.
Rutile is one of the five forms of titanium dioxide found in nature. Titanium is three times stronger than steel, while weighing only 42% as much, making it an ideal strong, lightweight metal for structures such as airplanes and rockets. It is also chemically inert under normal conditions, enabling its use in medical implants such as pacemakers. It is light weight, non-corrosive, able to withstand temperature extremes (especially its high melting point, 1800 degrees C) and has good strength.