Opal & Tourmaline is the Best October Birthday Gifts all time.

Opal & Tourmaline have become the staple birthstones of October. Opal and Tourmaline are both some of the most beautiful and untraditional of all gemstones. Traditionally represented as pink, the tourmaline can come in many colors of the rainbow. Even seen with 3 colors in one stone, it is known as tri-colored watermelon tourmaline. October sure has the most exciting birthone options in jewelry designs.

Opal is the product of seasonal rains that drenched dry ground in regions such as Australia’s semi-desert “outback.” The showers soaked deep into ancient underground rock, carrying dissolved silica (a compound of silicon and oxygen) downward. During dry periods, much of the water evaporated, leaving solid deposits of silica in the cracks and between the layers of underground sedimentary rock. The silica deposits formed opal.

Opal is known for its unique display of flashing rainbow colors called play-of-color. There are two broad classes of opal: precious and common. Precious Opal displays play-of-color, common opal does not. Play-of-color occurs in precious opal because it’s made up of sub-microscopic spheres stacked in a grid-like pattern—like layers of Ping-Pong balls in a box. As the lightwaves travel between the spheres, the waves diffract, or bend. As they bend, they break up into the colors of the rainbow, called spectral colors. Play-of-color is the result.

The Color of Opal you see varies with the sizes of the spheres. Spheres that are approximately 0.1 micron (one ten-millionth of a meter) in diameter produce violet. Spheres about 0.2 microns in size produce red. Sizes in between produce the remaining rainbow colors.

Although experts divide gem opals into many different categories, five of the main types are:

White or light opal: Translucent to semi translucent, with play-of-color against a white or light gray background color, called bodycolor.
Black opal: Translucent to opaque, with play-of-color against a black or other dark background.
Fire opal: Transparent to translucent, with brown, yellow, orange, or red body color. This material—which often doesn’t show play-of-color—is also known as “Mexican opal.”
Boulder opal: Translucent to opaque, with play-of-color against a light to dark background. Fragments of the surrounding rock, called matrix, become part of the finished gem.
Crystal or water opal: Transparent to semitransparent, with a clear background. This type shows exceptional play-of-color.
Opal october birthstone jewelry is one of the best idea for october birthday gift. Check opal october birthstone jewelry.

Tourmalines come in a wide variety of exciting colors. In fact, tourmaline has one of the widest color ranges of any gem species, occurring in various shades of virtually every hue. Many tourmaline color varieties have inspired their own trade names:

Rubellite is a name for pink, red, purplish red, orangy red, or brownish red tourmaline, although some in the trade argue that the term shouldn’t apply to pink tourmaline.
Indicolite is dark violetish blue, blue, or greenish blue tourmaline. Check below tourmaline jewelry set.
Paraíba is an intense violetish blue, greenish blue, or blue tourmaline from the state of Paraíba, Brazil.
Chrome tourmaline is intense green. In spite of its name, it’s colored mostly by vanadium, the same element that colors many Brazilian and African emeralds.
Parti-colored tourmaline displays more than one color. One of the most common combinations is green and pink, but many others are possible.
Watermelon tourmaline is pink in the center and green around the outside. Crystals of this material are typically cut in slices to display this special arrangement.
Tourmaline birthstone jewelry is another great idea for october birthday gift.

Ethiopian Opal Gold-filled Post Earrings

Designer: Anchovy

Tags

Shipping Date

Shipping Date

More in this Collection

Karin Earrings with Opal Doublet

Lika Behar

Pink Tourmaline Trillion Cabochon Earrings in Gold & Silver

Claudia Berman

Teal Green Tourmaline Cabochon Necklace in Gold & Silver

Claudia Berman

Opal Sierra Pendant

Jenny Reeves

Watermelon Tourmaline Studs

Jenny Reeves

Vario Clasp Blue Opal Pendant with Diamond Accent

Marcel Roelofs

Natural Ethiopian Opal and Natural Diamond Necklace

Lireille

Vario Clasp Moonstone and Pink Tourmaline 18K yellow gold

Marcel Roelofs

Genuine AAA Quality Ethiopian Opal Bead Adjustable Necklace

Anchovy

Raw Ethiopian Opal Necklace with Gold-Filled Adjustable Chain

Anchovy

Watermelon Tourmaline and Pearl Gold-Filled Adjustable Bracelet

Anchovy

Ethiopian Opal Adjustable Gold-Filled Chain Bracelet

Anchovy

14K White Gold 6 mm Square Floral Engagement Ring with Blue Tourmaline

Lireille

Love Ring Bluish Green Tourmaline

Lika Behar

Vario Clasp Aquamarine, Tourmaline and Diamond Pendant

Marcel Roelofs

Blue Tourmaline Ring

Marcel Roelofs

Ocean Ring 22K Gold with Marquise Shape Opal Doublet & Diamonds

Lika Behar

Love Bicolor Tourmaline Ring

Lika Behar

24K Gold Diva Ring with Green Tourmaline and Diamonds

Lika Behar

Diva Ring with 22K Gold Emerald Cut Pink Tourmaline Ring

Lika Behar

Ethiopian Opal 14 Karat Solid Yellow Gold Stud Earrings

Anchovy

14k Gold Cabochon 4 mm Natural White Opal Bezel-Set Solitaire Stud Earrings

Lireille

Redwood Slice Pendant - Large - Opal

Jenny Reeves

Sunburst Pendant with 6 mm Round Opal - Large

Jenny Reeves

Sunset Pendant - Small - Opal Pendant

Jenny Reeves

Sunset Drops - Small - Opal Earrings

Jenny Reeves

Redwood Drops - Opal

Jenny Reeves

Ocean Necklace

Lika Behar

Ocean Earrings

Lika Behar

Ocean Necklace

Lika Behar

14K Gold 0.28 CTW Natural Pink Tourmaline Bezel-Set Earrings

Lireille

14K Gold 0.28 CTW Natural Green Tourmaline Bezel-Set Earrings

Lireille

Double Tourmaline Crystals Ocean Blue and Green Dangle Earrings

Claudia Berman

Brazilian Deep Green Cabochon Tourmaline Earrings

Claudia Berman

Brilliant Ethiopian Opal Cabochon Earrings

Claudia Berman

Brazilian Indicolite Blue Tourmaline Drop Cabochon Earrings

Claudia Berman

Large Brazilian Rubellite Tourmaline Drop Cabochon Set

Claudia Berman