The Ajediam Glossary

U-Cut refers to a gemstone cut with a square or rectangular shape and truncated corners, often employed to showcase the gem's clarity and color with a distinct geometric elegance.

The U-Prong Setting is a jewelry technique where prongs are shaped like a 'U' to securely hold gemstones, allowing more light exposure and enhancing the brilliance of the set stones.

The Udjat eye, also known as the Wedjet eye, is an ancient Egyptian symbol representing protection, health, and restoration. It is often associated with the Eye of Horus and is a popular motif in jewelry, believed to bring blessings and ward off negative energies.

Ugni is a rare and valuable gemstone, known for its intense blue color and exceptional clarity, making it a prized collector's item among gemstone enthusiasts.

An Ultrasonic Cleaner is a device widely used in jewelry care, utilizing ultrasonic waves and a cleaning solution to remove dirt and debris from intricate jewelry pieces efficiently.

Ultrasonic Drilling is a jewelry technique using ultrasonic vibrations to drill precise holes in gemstones, offering a method that is both efficient and minimizes the risk of damage to the stone.

Ultrasonic Sealing is a jewelry technique utilizing ultrasonic vibrations to seal metal surfaces, providing a secure and aesthetically pleasing method for joining metal components in jewelry making.

Ultrasonic Welding is a precise jewelry technique using ultrasonic vibrations to join metals without melting, enabling intricate and seamless connections in the creation of finely crafted jewelry pieces.

Beyond the visible spectrum, ultraviolet light is employed in gemstone analysis and identification, revealing unique fluorescence and characteristics not visible to the naked eye.

An Ultraviolet Lamp is a tool emitting UV light, essential for gemologists to identify fluorescence and other unique characteristics in gemstones that may affect their color and quality.

The Ultraviolet Spectrum encompasses the range of ultraviolet light wavelengths, crucial in gemology for evaluating gemstone fluorescence and other characteristics not visible to the naked eye.

Unakite, a unique gemstone, is a type of granite composed of pink feldspar, green epidote, and quartz, creating a distinctive mottled appearance often used in jewelry designs.

The Uncle Sam Diamond is a notable diamond discovered in the United States. This white diamond, with exceptional clarity and weighing a significant carat, gained historical significance due to its use as collateral for war bonds during World War II, reflecting a unique chapter in gem history.

Undercutting is a meticulous jewelry technique involving cutting beneath a gemstone's table to create facets, enhancing its brilliance and visual appeal. This method is commonly used to maximize a gem's beauty.

Underground Gem Deposits are gemstone deposits found beneath the Earth's surface, requiring specialized mining techniques to extract these valuable gems from hidden locations.

Underground Mining is the extraction of minerals and gems from below the Earth's surface, requiring specialized techniques to access valuable deposits hidden beneath layers of rock and soil.

Unheated refers to a gemstone that has not undergone heat treatment for color enhancement, ensuring that the stone's natural color is preserved, often valued for its authenticity and rarity.

An Unheated Sapphire is a sapphire that has not been subjected to heat treatment, maintaining its natural color and purity, often sought after for its rarity and unaltered beauty.

In jewelry, a unicorn horn refers to a mythical or artistic representation rather than an actual unicorn horn. Often crafted from materials like horn, bone, or precious metals, unicorn horn jewelry symbolizes fantasy and whimsy, adding a touch of enchantment to the wearer's style.

Uniform Color in a gemstone denotes a consistent and evenly distributed color throughout the stone, a highly desirable quality that enhances the overall beauty and value of the gem.

Uniformity in a gemstone refers to consistency in its appearance, including color, clarity, and cut, contributing to higher grading and certification standards in the gemstone industry.

A union pin is a type of jewelry, typically a pin or brooch, that symbolizes affiliation with a labor union. These pins often bear symbols associated with the labor movement and workers' rights, serving as both a personal statement and a historical artifact of social and political significance.

Unique Design in jewelry refers to one-of-a-kind creations that stand out from mass-produced pieces, showcasing individuality, creativity, and craftsmanship in every meticulously crafted detail.

A Unisex Bracelet is a versatile accessory designed to be worn by both men and women, featuring elements and styles that cater to a broad spectrum of fashion preferences.

Unisex Jewelry is designed to be suitable for both men and women, featuring versatile styles and elements that appeal to a broad range of preferences and fashion sensibilities.

Unit-constructed jewelry refers to pieces composed of modular or interchangeable units, allowing for customization and personalization. This design approach offers flexibility and creative expression, enabling wearers to assemble unique configurations that reflect their individual style and preferences.

Unplated jewelry refers to pieces without a coating or plating, allowing the natural beauty of the metal to shine through, providing a classic and timeless appeal in various jewelry styles.

An Unpolished gemstone is one that has not undergone polishing, featuring a natural and raw appearance, often chosen for its unique charm and the authenticity of its untouched state.

Uparatna refers to a substitute gemstone used in place of a primary gemstone due to budget constraints, providing an affordable yet aesthetically pleasing alternative for those seeking precious stones.

Upcycled Jewelry represents a sustainable approach, with pieces crafted from repurposed materials, reducing waste and contributing to eco-friendly practices in the jewelry industry.

Upcycled Metals in jewelry production involve the use of recycled materials, contributing to environmentally friendly practices and reducing the ecological footprint of metal sourcing.

Upcycling in the jewelry industry involves creatively repurposing old or discarded materials into new and unique pieces, contributing to sustainable practices and reducing environmental impact.

Ur Treasure may refer to jewelry or artifacts originating from the ancient Mesopotamian city of Ur. These treasures often include gold and precious stones, showcasing advanced craftsmanship of the time and providing valuable insights into the artistic and cultural achievements of the ancient civilization.

The Uraeus is an ancient Egyptian symbol of a rearing cobra, often worn as a headdress or ornament, symbolizing divine authority and protection. It is commonly associated with royalty and deities, signifying the pharaoh's power and divine connection in the context of ancient Egyptian jewelry design.

Uralian emeralds are emeralds mined in the Ural Mountains of Russia. Known for their unique green hue, they hold historical significance and are sought after in the world of gem collecting. These emeralds, with their distinct coloration, represent the geological richness of the Ural region and its contribution to gemstone diversity.

An Urartian belt refers to a belt or waist ornament associated with the Urartu civilization. These belts often feature intricate metalwork and symbolic motifs, reflecting the artistry of the ancient culture. Urartian belts not only served as functional accessories but also conveyed cultural identity and artistic prowess in the realm of antique jewelry.

Utahlite is a term used to describe a type of gemstone or mineral found in Utah, USA. Its properties and appearance can vary, and it may be used in jewelry or collected for its geological significance. Whether featured in unique jewelry designs or admired for its geological rarity, Utahlite represents the natural beauty and diversity of gem materials found in the American Southwest.

Uvarovite is a rare green garnet variety, prized for its vibrant color and distinct chromium content, making it a sought-after gemstone among collectors and enthusiasts.

Uvarovite Garnet, a green garnet variety, is known for its vibrant color and exceptional brilliance, making it a popular choice among gemstone enthusiasts and collectors for its unique aesthetic appeal.