October Birthstone: Opal or Tourmaline
About Opal:
Opal’s characteristic “play-of-color” was explained in the 1960s, when scientists discovered that it’s composed of microscopic silica spheres that diffract light to display various colors of the rainbow. These flashy gemstones are called “precious opals.” Those without play-of-color are “common opals.”
Dozens of opal varieties exist, but only a few, such as fire opal and boulder opal, are universally recognized. Opals are often referred to by their background “body color” of black or white.
Opal’s classic country of origin is Australia, but Opal is also mined in Mexico, Brazil, Honduras, Ethiopia, the Czech Republic, and parts of the U.S., including Nevada and Idaho.
Wearing opal jewelry is well worth the extra care, though. This October birthstone has remained a popular choice for centuries.
About Tourmaline:
Tourmaline is not one mineral, but a fairly complex group of minerals with different chemical compositions and physical properties. Certain trace elements produce distinct colors, and many resulting varieties have their own names.
Tourmaline is mined in Brazil, Sri Lanka, Nigeria, Mozambique, Madagascar, Afghanistan, Pakistan and the U.S.—primarily Maine and California.

Trillion Cut Tourmaline Stud Earrings

14k Gold, Opal and Diamond Necklace

Sweet Charity Earrings

Tungsten Band Ring with Blue Green Opal Inlay

Sterling Silver Birthstone Pendant

Opal Earrings Transformed Into Necklace for Christine

Custom Jade and Opal Engagement Ring for Pascual

Trillion Stud Dangle 18k Gold Earrings with Tourmaline