multiple opals on black background

Discovering Opals: Their History, Symbolism, and Allure

Posted by Grogan Jewelers By Lon on Aug 24, 2023 1:47:43 PM

Opals, the enchanting gemstones of shifting colors and otherworldly iridescence, have been a popular choice for jewelry for centuries. With their mesmerizing play of color that dances and shimmers as the angle changes, opals are truly unique. These precious stones have adorned the crowns of royalty, graced the fingers of ancient civilizations, and continue to inspire awe today. In this exploration of opals, we'll cover their history, symbolism, and the unique characteristics that make them a beloved gemstone.

How Opals are Formed

Formed through the intricate interaction of water and silica, opals are categorized as amorphous mineraloids, a distinction from crystalline minerals. Unlike traditional minerals with defined crystal structures, opals display a more chaotic arrangement of silica spheres, resulting in their striking iridescence.

Opals form in voids within rocks, often left behind by decaying organic material or trapped water. Water-carrying dissolved silica infiltrates these cavities and slowly deposits silica into tiny spheres. The arrangement of these spheres gives opals their famous "play of color."

There are several types of opals, each with its distinct characteristics and allure. Precious opals exhibit a beautiful play of color against a dark background, ranging from fiery reds and oranges to vibrant blues and greens. Common opals, on the other hand, lack play of color but often display beautiful pastel hues. Fire opals, known for their warm and fiery oranges and reds, are highly prized for their intense colors.

Play of Color in Opals

Play of color is a phenomenon that transforms these gemstones into dynamic, living canvases of light. This effect is a result of the intricate arrangement of microscopic silica spheres found within the opal's structure. As light enters the stone, it encounters these tiny spheres, and their arrangement causes the diffraction of light. The result is a spectacular display of vivid colors that shift and change as the angle of observation shifts, much like a kaleidoscope.

Silica Spheres and Diffraction

The play of color is a direct consequence of the size and arrangement of the silica spheres within the opal. These spheres, often smaller than the wavelength of visible light, scatter the light waves as they pass through. Depending on the precise arrangement of spheres and the size of the gaps between them, different colors of the visible spectrum are produced. This optical interference and diffraction give rise to the vibrant colors that seem to dance across the opal's surface.


Opals exhibit a range of play of color patterns, each adding a unique character to the gemstone. Pinfire opals display small, intense pinpoints of color. Harlequin opals are known for their distinct mosaic-like pattern, often resembling a pattern of interlocking diamonds. Rolling flash opals exhibit a rolling movement of color as the stone is rotated.

Symbolism and Meanings of Opals

In ancient Rome, opals were linked to the ideals of hope and purity, embodying notions of innocence and virtue. In Greek mythology, opals sprang from Zeus' tears of triumph after vanquishing the Titans. Through the Middle Ages, amulets containing opals were believed to safeguard one's vision while enhancing mental acuity and memory. And the Arabic world attributed their origin to the celestial, suggesting that opals were fragments of rainbows falling from the heavens during lightning storms.

Opals are favored by many artists and creatives due to their association with creativity and inspiration. They have also been embraced as tokens of loyalty and dedication in relationships. This distinct quality makes opals a deeply meaningful option for engagement rings and other sentimental jewelry pieces, symbolizing the enduring and evolving bond between two individuals.

Dispelling the Myths

While opals have been revered for their beauty and symbolism, they have also been shrouded in myths and superstitions. In some cultures, opals were considered "bad luck" stones, perpetuating the notion that they brought misfortune to their wearers. However, this misconception is rooted in historical inaccuracies and unfounded fears. In reality, opals hold a rich legacy of positive symbolism, making them a unique and cherished choice for jewelry that carries a message of hope, creativity, and enduring love.

Opals Through History

Opals have adorned the regal crowns of monarchs and held significance in ancient cultures. Notably, the "Andamooka Opal" was discovered in Australia in the 1940s and presented to Queen Elizabeth II on her visit to the country in 1954. The opal was set into a brooch featuring diamonds, and it became a cherished part of Queen Elizabeth II's jewelry collection.

Queen Victoria also owned opal-set jewelry, including her Indian Circlet. And Empress Josephine possessed the renowned "The Burning of Troy" opal, a gift from Napoleon. In contemporary times, figures like Cate Blanchett and Miranda Kerr have graced red carpets with opal jewelry.

Opal Birthstones, Anniversary Stones, and More

The October Birthstone

As the birthstone for October, opals are believed to bring luck and happiness to those born during this time. Opal's play of color make it a perfect gemstone to represent the transition of seasons and the vibrant spirit of autumn.

Celebrating Milestones with Opals

Opals are often chosen as anniversary stones for the 14th and 18th years of marriage. The opal's symbolism of loyalty, love, and hope adds a meaningful touch to anniversary celebrations, representing the enduring bond and the colorful journey a couple has embarked upon together.

Other Important Moments

Opal engagement rings are gaining popularity as a distinctive alternative to traditional diamond rings. Their unique color patterns and symbolic meaning make them an ideal option for couples who want a truly unique and meaningful symbol of their love. Opal jewelry is also frequently passed down as treasured heirlooms, carrying the stories and memories of generations.

Caring for Opals

Caring for opals requires a gentle touch and an understanding of their unique sensitivities. Opals are delicate gemstones that can be adversely affected by changes in temperature and moisture levels. To preserve their play of color, it's important to handle opal jewelry with care and avoid subjecting them to extreme conditions.

Shielding from Moisture and Heat

Opals are particularly sensitive to moisture due to their high water content. Prolonged exposure to water or high humidity can lead to changes in their appearance and structure. Additionally, opals should be protected from excessive heat, which can cause dehydration and cracking. It's advisable to remove opal jewelry before engaging in activities that involve water or exposure to heat, such as swimming or using hot tubs.

Proper Storage for Opal Jewelry

Storing opal jewelry correctly is essential for maintaining its beauty over time. To prevent moisture-related damage, store opal jewelry in a dry environment away from direct sunlight. It's a good practice to keep opal pieces in individual pouches or lined compartments to prevent them from coming into contact with harder gemstones that could potentially scratch their surface.

Buying Opal Jewelry

Selecting the perfect opal jewelry is a journey of exploring colors and choosing a piece that resonates with your personal style. When purchasing opal jewelry, consider the following factors to ensure you make a wise and enchanting choice.

Play of Color

The play of color is the heart and soul of opals. Look for opals that exhibit a beautiful display of colors that shift and shimmer as the gemstone is moved. Opals with broad flashes of vibrant colors are highly sought after, as they create a visual experience that is both unique and magical.

Types of Opals

Opals come in various types, each with its own distinct qualities. Precious opals include black opals, white opals, and boulder opals. Common opals, often found in a single color or lack of play of color, are still treasured for their unique hues.

Setting and Design

The setting of an opal can significantly enhance its beauty. Choose a setting that offers protection to the gemstone while allowing light to enter and illuminate its play of color. Bezel settings and opal doublets or triplets are popular choices, offering both aesthetic appeal and durability.

Trustworthy Sources and Expertise

When purchasing opals, seek out reputable jewelers who specialize in these exquisite gemstones. Reputable jewelers will provide you with detailed information about the opal's origin, type, and quality. Educate yourself about opals, and don't hesitate to ask questions to ensure you're making an informed decision.


Whether you're drawn to their color, their symbolism, or their role as birthstones and anniversary stones, opals invite you to discover the magic within their depths. As you shop for opal jewelry, remember that you're not just owning a gemstone; you're embracing a legacy of wonder, rich symbolism and meaning, and enduring beauty. So let the opals light your way, reflecting the unique play of color that is both a reminder of nature's artistry and a glimpse into the splendor of the cosmos.

Shop Grogan Jewelers online or in-store to discover opal pieces that speak to your heart and imagination.