





I bet you thought there was only one birthstone for August, but there's actually 3
! Spinel is a recent addition to the birthstone list. It is also the gemstone for the 22nd anniversary.
History
A lot of people aren't familiar with spinel. This is because it was often mistaken for other gems, especially ruby. In fact, many historically significant "rubies" are spinel! The Crown Jewels of many countries include spinel: (images below)
-The Timur Ruby is a 352.5 carat spinel that was owned by the Asian conqueror Timur in the 14th century. In 1851, it was given to Queen Victoria by the East India Company, and is now part of Great Britain's Crown Jewels.
-The Imperial Crown of Austria was created in 1602 for Holy Roman Emperor Rudolf II. Containing red spinel, zircon, and pearls, it was part of the Hapsburg lineage in the Austro-Hungarian Empire until 1918.
-Russia's Great Imperial Crown,used from the reign of Catherine II through that of Nicholas II, contains the world's second-largest spinel at 398.72 carats
-The world's largest spinel (500 carats!), known as the Samarian Spinel, is in the Iranian Crown Jewels. It has a hole in it that has been hidden by setting a diamond in it. A diary entry from the physician of Nasser al-Din Shah Qajar states that the king told him the gem once adorned the neck of the biblical golden calf.
-The Black Prince's Ruby, in Great Britain's Imperial State Crown, is probably the most famous spinel. The 170 carat gem was owned by multiple Moorish and Spanish kings. In 1367, it was given to Edward (the Black Prince of Wales) for winning a battle on behalf of Peter of Castile. It was on King Henry V's battle helmet, and supposedly worn by Richard III when he died at the Battle of Bosworth. It now sits just above the Cullinan II diamond on the crown.
Spinel was easily confused with rubies and sapphires for over 1000 years. Myanmar traders recognized the difference in the late 1500s, but Europe continued to misname them until the mid 1800s.
The traditional birthstone list was issued in 1912 by the National Association of Jewelers, now the Jewelers of America. It listed only peridot as the August stone. In 2016, spinel was added by Jewelers of America and the American Gem Trade Association (AGTA). The Jewelry Council of America, AGTA, and the National Association of Goldsmiths of Britain promote birthstones.
Metaphysical
As with all red gems, spinel was believed to be a remedy for blood loss and inflammatory diseases, to ease anger, and to promote harmony. It corresponds to the root chakra. It can help set aside the ego and become devoted to another person. Spinel reduces forgetfulness and boosts the intellect. If you want to increase physical and mental stamina, spinel is the gem for you.
Geological
Spinel is a metamorphic mineral found in igneous rocks. It's easy to see why it was confused with ruby and sapphire, since it is the same colors and found in the same locations. However, there are differences. It grows in isometric crystals versus the hexagonal crystal structure of corundum. It was discovered in the 1800s to have a different chemical structure as well.
There are several geologic situations which produce spinel. Crystals in limestone and dolomite, irregular grains in igneous rocks, and water-worn pebbles in alluvial deposits. It grows inside of marble, which is softer. As the marble erodes, the spinel crystals are washed downstream to be found loose.
Spinel is found in many locations. Myanmar produces hot pink to red stones. Blues, pinks, and purples, are found in the southern half of Sri Lanka. In Vietnam, red, purple, pink, and violet were mined in the 1980s. In the 2000s, they found a vivid blue. Tanzania has produced purple, blue, and, most recently, pinkish to orangey-red. Spinel has also been found in Afghanistan, Pakistan, and Tajikistan.
The different colors of spinel are caused by different trace elements in the stone. Red or pink comes from chromium. Orange and purple are caused by a mix of iron and chromium. Violet to blue comes from iron, and the most vibrant blue is from cobalt.
Due to its 7.5-8 Mohs hardness, spinel is a good choice for jewelry. Synthetic spinel has been used for "birthstone" jewelry for decades since it is more durable than other imitation stones. It is also used for heat-resistant coating on tools.
Are you looking for spinel jewelry? We can help with that!