Post by Kirree on Apr 10, 2004 16:43:07 GMT -5
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SCIENTIFIC INFORMATION: Opal is hydrous silica, often with some iron and aluminum. Its chemistry is SiO2.nH2O; amount of water varies up to 10 percent. It ranges in color from White, yellow, red, pink, brown to gray, blue and even colorless. It is most easily recognized by its rich internal play of colors (opalescence). Its hardness ranges from 5-1/2 to 6-1/2. It is vitreous and pearly. The streak is white. It is not found in crystal form, rather is usually massive, botryoidal, reniform, stalactitic, and/or earthy.
ENVIRONMENT: Opal is a low-temperature mineral and usually develops in a wide variety of rocks as cavity and fracture fillings. It frequently develops as amygdules in basalt and rhyolite of volcanic rock and replaces the cells in wood and the shells of clams.
OCCURRENCE: Common opal is widespread and can be readily obtained at many places, but localities for precious opal are rare and seem to localized in W United States and Mexico. Magnificent examples of opalized wood can be found in Idaho, Nevada, Oregon, Utah, and Washington, and lively green fluorescing opal (hyalite) occurs in seams in pegmatites in New England and North Carolina and in cavities in basalt near Klamath Falls, Oregon. Beautiful precious opal, as a replacement in wood, has been obtained in Virgin Valley, Humboldt Co., Nevada. Excellent fire and precious opal occur in lava flows in N Mexico. Nevada, Australia, and Honduras are sources for black opal; Australia and Czechoslovakia for white opal; Mexico and SW United States for fire opal.
GEMSTONE INFORMATION: Black, dark blue, dark green opal with dark gray body color and fine play of colors is called [black opal;] opal with white or light body color and fine play of color is called [white opal;] and transparent to translucent opal with body color ranging from orange-yellow to red and a play of colors is called [fire opal.] Play of colors depends upon interference of light and is not dependent upon body color. Black opal is the most highly prized, and fire opal is the most valued of the orange and red varieties. Most opal is fashioned into cabochons, but some fire opals are faceted.
NAME: The word is from the Sanskrit [upala,] meaning "precious stone."
LEGEND and LORE: Opal is a birthstone for October.
"October's child is born for woe,
And life's vicissitudes must know;
But lay an Opal on her breast,
And hope will lull those foes to rest." (5)
Opals have traditionally been considered "lucky" stones...but only for those born in the month of October. It has been considered bad luck to wear them if you were born in any other month.
MAGICAL PROPERTIES: Opal is considered to be able to confer the gift of invisibility on its wearer. To accomplish this, Cunningham says "The gem was wrapped in a fresh bay leaf and carried for this purpose." He also says, "Opals are also worn to bring out inner beauty. A beauty spell: Place a round mirror on the altar or behind it so that you can see your face within it while kneeling. Place two green candles on either side of the mirror. Light the candles. Empower an opal with your need for beauty -- while holding the stone, gaze into your reflection. With the scalpel of your visualization, mold and form your face (and your body) to the form you desire. Then, carry or wear the opal and dedicate yourself to improving your appearance." (2)
HEALING: Opals contain all the colors of the other stones, thus, it could be used in place of any of them. (They are akin to quartz crystals, in this aspect.) Generally speaking, Opal is used more frequently for healing the spirit, rather than the physical body.
SCIENTIFIC INFORMATION: Opal is hydrous silica, often with some iron and aluminum. Its chemistry is SiO2.nH2O; amount of water varies up to 10 percent. It ranges in color from White, yellow, red, pink, brown to gray, blue and even colorless. It is most easily recognized by its rich internal play of colors (opalescence). Its hardness ranges from 5-1/2 to 6-1/2. It is vitreous and pearly. The streak is white. It is not found in crystal form, rather is usually massive, botryoidal, reniform, stalactitic, and/or earthy.
ENVIRONMENT: Opal is a low-temperature mineral and usually develops in a wide variety of rocks as cavity and fracture fillings. It frequently develops as amygdules in basalt and rhyolite of volcanic rock and replaces the cells in wood and the shells of clams.
OCCURRENCE: Common opal is widespread and can be readily obtained at many places, but localities for precious opal are rare and seem to localized in W United States and Mexico. Magnificent examples of opalized wood can be found in Idaho, Nevada, Oregon, Utah, and Washington, and lively green fluorescing opal (hyalite) occurs in seams in pegmatites in New England and North Carolina and in cavities in basalt near Klamath Falls, Oregon. Beautiful precious opal, as a replacement in wood, has been obtained in Virgin Valley, Humboldt Co., Nevada. Excellent fire and precious opal occur in lava flows in N Mexico. Nevada, Australia, and Honduras are sources for black opal; Australia and Czechoslovakia for white opal; Mexico and SW United States for fire opal.
GEMSTONE INFORMATION: Black, dark blue, dark green opal with dark gray body color and fine play of colors is called [black opal;] opal with white or light body color and fine play of color is called [white opal;] and transparent to translucent opal with body color ranging from orange-yellow to red and a play of colors is called [fire opal.] Play of colors depends upon interference of light and is not dependent upon body color. Black opal is the most highly prized, and fire opal is the most valued of the orange and red varieties. Most opal is fashioned into cabochons, but some fire opals are faceted.
NAME: The word is from the Sanskrit [upala,] meaning "precious stone."
LEGEND and LORE: Opal is a birthstone for October.
"October's child is born for woe,
And life's vicissitudes must know;
But lay an Opal on her breast,
And hope will lull those foes to rest." (5)
Opals have traditionally been considered "lucky" stones...but only for those born in the month of October. It has been considered bad luck to wear them if you were born in any other month.
MAGICAL PROPERTIES: Opal is considered to be able to confer the gift of invisibility on its wearer. To accomplish this, Cunningham says "The gem was wrapped in a fresh bay leaf and carried for this purpose." He also says, "Opals are also worn to bring out inner beauty. A beauty spell: Place a round mirror on the altar or behind it so that you can see your face within it while kneeling. Place two green candles on either side of the mirror. Light the candles. Empower an opal with your need for beauty -- while holding the stone, gaze into your reflection. With the scalpel of your visualization, mold and form your face (and your body) to the form you desire. Then, carry or wear the opal and dedicate yourself to improving your appearance." (2)
HEALING: Opals contain all the colors of the other stones, thus, it could be used in place of any of them. (They are akin to quartz crystals, in this aspect.) Generally speaking, Opal is used more frequently for healing the spirit, rather than the physical body.