Whenever we discuss about cabochon gemstones, the names of corals and opals always pop up first. Both gemstones are some of the most sought-after gems in the categories and precious and semi-precious gemstones. Red Coral and Opal stand as captivating gemstones, each possessing unique qualities that distinguish them in the world of jewelry and gemstone enthusiasts.
]These two gems, with their distinct origins, mesmerizing colors, and cultural significance, captivate the imagination of those seeking unique and meaningful pieces. Red Coral, sourced from the depths of the Mediterranean Sea, boasts a rich history and scarcity that contribute to its allure. On the other hand, Opal, found in diverse locales worldwide, enchants with its play-of-color and diverse varieties. As we explore the characteristics and qualities of Red Coral and Opal, it becomes evident that these gemstones not only adorn but also carry a tale of geological wonders and cultural significance. Join us on a journey to unravel the beauty and uniqueness of Red Coral vs Opal, comparing their attributes and shedding light on the factors that influence their individual charm and market value.
Table of Contents
Red Coral vs Opal: Origin
Coral
Coral is not a traditional mineral but rather an organic gemstone formed by living organisms. It primarily originates from coral reefs, which are underwater structures built by colonies of tiny marine animals called polyps. The hard skeletons of these polyps, composed of calcium carbonate, accumulate over time, creating the beautiful and intricate structures known as coral reefs. The red and pink varieties of coral, particularly prized in jewelry, are primarily sourced from the Mediterranean Sea, the Red Sea, and the Pacific Ocean.
The formation of coral involves a slow and continuous process. Coral polyps extract calcium carbonate from the seawater and secrete it as a hard exoskeleton. Over the years, layers of these exoskeletons build up, creating the distinctive branching or compact structures seen in coral reefs. Once harvested, the coral is then shaped and polished for use in jewelry.
Opal
Opal, on the other hand, is a mineraloid composed of hydrated silica spheres. It is renowned for its captivating play-of-color, where vibrant hues dance across the surface of the gem. Opals are typically found in sedimentary rocks, often formed in areas with a history of volcanic activity. Australia is the world’s primary source of precious opals, particularly the famous Lightning Ridge and Coober Pedy mines. Other notable opal stone deposits can be found in Ethiopia, Mexico, and Brazil.
Opals are formed through the interaction of silica-rich water and organic debris, creating an environment conducive to the gradual deposition of silica spheres. The play-of-color effect results from the diffraction of light as it interacts with the microscopic spheres within the opal’s structure. The specific conditions under which opals form, including factors like temperature and pressure, contribute to the unique patterns and colors exhibited by different opal varieties.
Red Coral vs Opal: Color
Red Coral
Red coral gets its name from its distinctive red coloration. It ranges from light pinkish orange to a deep, rich red that resembles the red of rubies or red wine. The red comes from the skeletons of tiny marine invertebrates called coral polyps that build up coral reef structures over time. Good quality red coral is highly prized for its intense, saturated red tones. Lower grade coral can look more pinkish or pale orange.
Opal
In contrast to red coral’s predictably red shades, opal is prized for its play of color – the flashes of different spectral colors like red, green, blue, purple that dance across the stone when moved. No two opals produce the exact same play of color, making each stone unique. The colors emerge when light bounces off the tiny silica spheres that make up opal’s structure. Depending on the angle, some colors get reinforced while others cancel out. The most valuable opal displays strong play of color with a range of spectral flashes. Lower quality opal may show only faint wisps of color.
In summary, red coral derives its name and value from its solid red coloration, while opal is all about the mesmerizing shifting colors within each stone. Their highly distinct color displays make them easy to tell apart as gemstones. Red coral shows a single true red color, while opal cycles through red, green, blue, purple and more in unpredictable patterns.
Don’t Forget: – Red Coral vs White Coral
Red Coral vs Opal: Physical Properties
Red Coral
Composition
Red Coral, also known as Corallium rubrum, is an organic gemstone formed by marine polyps. Its composition primarily consists of calcium carbonate with trace elements that contribute to its vibrant red and pink hues.
Color
The most prized Red Coral stone exhibits a deep red to pinkish-red color. The intensity and uniformity of the red color are essential factors determining its value. Other color variations, such as orange and pink, are also found but are generally considered less desirable.
Hardness
Red Coral is relatively soft compared to many other gemstones. It ranks between 3.5 and 4 on the Mohs scale of mineral hardness. This means it requires careful handling to prevent scratches and damage.
Transparency
Red Coral is opaque, meaning that light does not pass through it. This opacity enhances the saturation of its red color, giving it a solid and vibrant appearance.
Luster
Red Coral exhibits a vitreous to resinous luster, adding to its natural beauty. The polished surface of Red Coral displays a characteristic glow that is highly prized in jewelry.
Opal
Composition
Opal is a mineraloid composed of hydrated silica spheres. Its structure contains water, giving it a unique play-of-color, which is the gem’s most distinctive feature.
Color
Opal comes in a wide range of colors, and its most valued attribute is its play-of-color. This phenomenon displays a vivid array of colors that change with the angle of observation. Opals can be white, black, crystal, or boulder opals, each with its own captivating play-of-color.
Hardness
Opal’s hardness varies depending on its type. Precious opals, known for their play-of-color, generally have a hardness ranging from 5.5 to 6.5 on the Mohs scale. While opals are not as hard as some other gemstones, they are still suitable for jewelry when handled with care.
Transparency
Opals can be transparent, translucent, or opaque. The play-of-color is most prominent in translucent to opaque opals. Crystal opals, which are transparent, also exhibit this mesmerizing feature.
Luster
Opal displays a unique iridescence or play-of-color rather than a traditional luster. This phenomenon arises from the diffraction of light by the silica spheres within the gem, creating a captivating interplay of hues.
Read Worthy: – Astrological Benefits of Red Coral
Red Coral vs Opal: Astrological Benefits
Red Coral
In Indian astrology, red coral is associated with Mars and represents courage, ambition, and drive. It is believed to provide the following astrological benefits:
Strengthens Mars in one’s astrological chart. Mars governs motivation, drive, passion, and competitiveness. Wearing red coral can boost these qualities.
Helps overcome manglik dosha or the “Mars affliction” in one’s astrological chart. This dosha can cause delays and obstacles in key areas of life.
Supports careers and goals related to Mars and its qualities – the military, engineering, real estate, surgery, police work, etc. It boosts ambition and drive in these fields.
Improves willpower, vitality, strength, and determination. Helps face challenges.
Recommended for Aries and Scorpio ascendants in particular as it rules their charts.
Opal
In Vedic astrology, opal stone benefits are linked to Venus, the planet of beauty, art, love, relationships and comforts. It provides these benefits:
Strengthens Venus and its related qualities. This includes relationships, luxury, art, music, dance and poetry.
Supports careers or goals requiring high Venusian qualities – entertainment, jewelry, art, fashion design, music, dance, acting, luxury goods.
Improves one’s ability to attract relationship partners. Said to make one more desirable and magnetic.
Helps artistic inspiration and creativity in arts related fields.
Recommended for Taurus and Libra ascendants in particular as Venus rules their charts.
Never Miss: – Types of Opal
Red Coral vs Opal: Price
Red Coral
Price Range:
Average Cost: The price of red coral can range from moderate to high, depending on factors like size, color, and overall quality.
Investment Value: Due to its rarity and the increasing demand for natural gemstones, red coral is often considered an investment piece, potentially appreciating in value over time.
Opal
Price Range:
Wide Spectrum: Opals have a broad price range, with white opals generally being more affordable compared to the rarer black opals. The intensity of play-of-color also impacts the price.
Collectible Value: Opals are sought after by collectors, and unique, high-quality specimens can command premium prices, making them both beautiful jewelry pieces and potential investments.
Also Read: – How To Tell If An Opal Is Real?
Red Coral vs Opal: Popularity
Red Coral
Red coral has been used in jewelry and ornamentation for over 5,000 years in various cultures like China, India and the Mediterranean.
It was especially popular during the Greek, Etruscan and Roman civilizations and extensively used in jewelry and amulets.
It was considered a protective stone by these cultures and also held significance in Chinese astrology.
The red coral trade thrived during these ancient civilizations as it was gathered from the Mediterranean and coastal Asia.
Its popularity declined after the fall of the Roman empire but revived during Renaissance jewelry.
Today red coral jewelry is still sought after in Indian astrology and as fashion jewelry around the world.
Opal
Opal’s use dates back to ancient Mesopotamia, but its most prolific mining began in the 1800s.
It surged to immense popularity during the Art Nouveau movement as it perfectly suited the era’s romantic style.
Fine opalized fossils discovered in Australia in the 1890s led to a worldwide opal craze. Prices soared so high it was called the “opal fever”.
Opal remains a beloved October birthstone with continued high demand for Australian black opals and other rare natural specimens.
Its rainbow iridescence and play of color make it one of the most unique and desired gems today.
Check Out: – Opal vs Pearl
