Tag: Opal
Opal is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. The internal structure of precious opal causes it to diffract light, resulting in play-of-color. Play-of-color is defined as “a pseudochromatic optical effect resulting in flashes of colored light from certain minerals, as they are turned in white light”.
The word ‘opal’ is adapted from the Latin term opalus. Opal is considered the birthstone for people born in October.
In the Middle Ages, opal was considered a stone that could provide great luck because it was believed to possess all the virtues of each gemstone whose color was represented in the color spectrum of the opal. It was also said to grant invisibility if wrapped in a fresh bay leaf and held in the hand.
The stone is found in many colors such as blue opal, white, black, fire opal. The main source of opal is Australia, which is often cited as representing 95-97% of world supply. Other mining areas are Ethiopia, Nevada in the US and Mexico.
Spiritual properties of opal
- Opal is believed to attract money, abundance, and succeed in the financial sector.
- Gives fortune, love, power, positive thoughts, endurance, faith and forgiveness.
- Relieves oppressed emotions, sadness and removes melancholy.
Healing properties of opal
- Has the ability to protect the eyes and strengthen the heart.
- Works therapeutically against infections and viruses, facilitates purification of blood and kidneys.
- • Used for the treatment of stomach and intestine.
The first century Jewish historian Josephus believed there was a connection between the twelve stones in Aaron’s breastplate (signifying the tribes of Israel, as described in the Book of Exodus), the twelve months of the year, and the twelve signs of the zodiac.
Translations and interpretations of the passage in Exodus regarding the breastplate have varied widely, with Josephus himself giving two different lists for the twelve stones. St. Jerome, referencing Josephus, said the Foundation Stones of the New Jerusalem (Revelation 21:19–20) would be appropriate for Christians to use.
In the eighth and ninth century, religious treatises associating a particular stone with an apostle were written, so that “their name would be inscribed on the Foundation Stones, and his virtue. Practice became to keep twelve stones and wear one a month. The custom of wearing a single birthstone is only a few centuries old, though modern authorities differ on dates.
In 1912, in an effort to standardize birthstones, the (American) National Association of Jewelers (now called Jewelers of America) met in Kansas and officially adopted a list.
The Jewelry Industry Council of America updated the list in 1952 by adding Alexandrite for June, citrine for November and pink tourmaline for October. They also replaced December’s lapis with zircon and switched the primary/alternative gems for March. The American Gem Trade Association added tanzanite as a December birthstone in 2002.