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.

Shield Opal Gold Ring

Designer: Jenny Reeves

Tags

Shipping Date

Shipping Date

More in this Collection

Ethiopian Opal Necklace with Gold-Filled Chain

Anchovy

Terra Earrings -1"

Jenny Reeves

14K Gold Natural Blue Sapphire Baguette Bracelet

Interworld Designs

Open Me Locket

Mariella Pilato

Citrine necklace

Peg Fetter

18k Yellow Gold Parti Sapphire Diamond Engagement Ring

Shimara Carlow

Titanium Triple Groove Blue Anodized and Sapphire Ring

Interworld Designs

Oxidised Wrap Ring

Shimara Carlow

Karin Earrings with Opal Doublet

Lika Behar

Cloud Forest Rose Cut Montana Sapphire Stacking Set - Bright

Jenny Reeves

Opal Sierra Pendant

Jenny Reeves

Elegant Vintage Inspired 18K Rose Gold Oval Sapphire Engagement Ring Custom

Lireille

14K White Gold 1 CT Round Lab-Grown Diamond and Blue Sapphire Floral Engagement Ring

Lireille

14K White Gold Lab-Grown Blue Sapphire Floral Wedding Band

Lireille

Oval Eye-Clean Rose Cut Natural Green Australian Sapphire 1.81 Carat

Lireille

14K White Gold Lab-Grown Purple Sapphire Floral Wedding Band

Lireille

14K White Gold 1 CT Round Lab-Grown Diamond and Purple Sapphire Floral Engagement Ring

Lireille

AA Princess Cut Blue Sapphire 6 mm Square

Interworld Designs

Ethiopian Opal Adjustable Gold-Filled Chain Bracelet

Anchovy

Ethiopian Opal 14 Karat Solid Yellow Gold Stud Earrings

Anchovy

Short curved silver wiggly pendant with blue topaz & 18ct gold bead

Paul Finch

Curving Silver Wiggly Ring with Blue Topaz

Paul Finch

Long Silver Wiggly Drop Earrings with Blue Topaz

Paul Finch

Multi-Gemstone Gold Filled Bracelet with Lapis and Pearl

Anchovy

Dive-In Necklace

Lika Behar

Aqua Tourmaline Crystal Drops

Jenny Reeves

Blue Gold Rose Cut Montana Sapphire Ring

Claudia Berman

Terra Dewdrop Pendant with Opal

Jenny Reeves

Terra Opal Earring - 1"

Jenny Reeves

Cypress Solitaire Ring with 5mm Montana Sapphire

Jenny Reeves

Three-stone Yellow Gold Australian Sapphire with Accent Baguette Diamond Engagement Ring

Lireille

Bedrock Chevron Shape Moonstone Ring

Jenny Reeves

Vintage Inspired Sterling Silver .04 CTW Sapphire 18'' Necklace

Lireille

Prismic Ring

Lika Behar

14K Gold 3mm Round Citrine-Set Ring

Lireille

1.32ct Green Sapphire and 18k Gold and Diamond Ring set with 1/4 increment

Shimara Carlow

Oxidised Sapphire Shard Pendant with Diamond Accent

Shimara Carlow