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Precious Gems

All Information for this page regarding the minerals talked about is a DIRECT PASSAGE from Amethyst Galleries' Mineral Gallery.

Many of the villains in Bishoujo Senshi Sailormoon are named after minerals. Such villains include the Dark Kingdom generals, and the Deathbusters. We decided to do a little sideshow of the relation of minerals to our characters.

Cyprine

Sapphire Cyprine

Sapphire is the non-red variety of corundum, the second hardest natural mineral known to mankind. The red variety of corundum is Ruby. Sapphires are well known among the general public as being blue, but it can be nearly any color. The blue color is by far the most popular color for sapphire but orange-pink, golden, white, and even black have generated much interest in the gem trade. Oriented rutile crystal inclusions cause a six-pointed-star light effect (called asterism to form the popular Star Sapphire.

VARIETY INFORMATION:

USES: Gemstone.
BIRTHSTONE FOR: September
COLOR: various colors, except for red.
INDEX OF REFRACTION: 1.76 - 1.78
BIREFRINGENCE: 0.009
HARDNESS: 9 Cyprine was the most difficult of all the Witches 5 to defeat
CLEAVAGE: none, although there is a rhombic parting
CRYSTAL SYSTEM: trigonal
PLEOCHROIC: strongly


Pikurl could be either of these two, both descriptions fit her character, although ruby corrosponds with Cyprine more than pucherite does.

Pikurl Ruby

RUBY, the red variety of corundum

Ruby is the red variety of corundum, the second hardest natural mineral known to mankind. The non-red variety of corundum is Sapphire Sapphires are well known among the general public as being blue, but can be nearly any color. The red color in ruby is caused by trace amounts of the element chromium. The best shade of red for ruby is often given the name "pigeon blood red", but ruby can be any shade of red up to almost pink. Oriented rutile crystal inclusions cause a six-rayed-star light effect (called asterism) to form the popular Star Ruby. Rubies come from all over the world but good gemstones are found at Thailand, India, Madagascar, Zimbabwe, North Carolina in the U.S., Afghanistan, Pakistan, Sri Lanka, Kenya, Tanzania, Kampuchea, and perhaps most notably, Burma.

VARIETY INFORMATION:

USES: Gemstone.
BIRTHSTONE FOR: July
COLOR: various shades of red.
INDEX OF REFRACTION: 1.76 - 1.78
BIREFRINGENCE: 0.009
HARDNESS: 9 Just like her twin, she was the most difficult of the Witches Five to defeat.
CLEAVAGE: none, although there is a rhombic parting
CRYSTAL SYSTEM: trigonal
PLEOCHROIC: strongly

PUCHERITE

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Pucherite, whose name comes from the actual mine shaft (Pucher Shaft) from where the first specimens were found, is a rare bismuth vanadate mineral. Pucherite is found at the Wolfgang Mine near Schneeburg in Saxony, Germany and a few other places. The Wolfgang Mine is the mine that contains the Pucher Shaft. The bismuth in this mineral has an effect similar to the presence of lead in other minerals. It increases both the density and luster. Pucherite has a significant specific gravity of around 6.5 and a bright adamantine luster.

Pucherite is trimorphous with two other minerals: dreyerite and clinobisvanite. All three minerals have the same chemistry, BiVO4, but they all have different structures. This is reflected in the fact that pucherite is orthorhombic, clinobisvanite is monoclinic and dreyerite is tetragonal in symmetry. The differing structures has a slight effect on the overall yellow color of the group. Since the chemistry is the same, any change in the color of pure samples must be due to the structural differences. Dreyerite is typically orange-yellow to brownish yellow while clinobisvanite is just yellow to yellowish red, but pucherite is a dark reddish brown to less likely brownish yellow.

PHYSICAL CHARACTERISTICS:

Color is dark reddish brown to brownish yellow.
Luster is vitreous to adamantine.
Transparency: Crystals are transparent to translucent.
Crystal System is orthorhombic.
Crystal Habits include tabular well formed crystals with curved faces and sharp angles. Also acicular crystals and earthy masses.
Cleavage is perfect.
Fracture is conchoidal.
Hardness is 4.
Specific Gravity is approximately 6.3 - 6.7 (heavy for translucent minerals)
Streak is yellow.
Associated Minerals are limonite, bismite and bismuth.
Notable Occurrences are limited to Schneeburg, Saxony, Germany and Brejauba, Minas Gerais, Brazil.
Best Field Indicators are color, crystal habit, density, luster and associations.

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