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  1. Rock & Gem

    Citrine Stone: Faceting Shield of the Heart Design (opens in a new tab)

    Faceting citrine stone using the Shield of the Heart design is one of the exercises in Twelve Easy Gemstone Faceting Designs, A Guide for the Beginner Gemcutter. Written as a learning tool for beginner faceters, the book introduces twelve designs that progressively develop gemstone-cutting skills. The Shield of the Heart is the eighth design, helping…

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  2. Rock & Gem

    Ametrine: The Bicolor Quartz of Amethyst and Citrine (opens in a new tab)

    Ametrine is a rare bicolor variety of quartz that naturally combines the violet color of amethyst with the yellow-to-orange color of citrine in a single crystal. Most gem-quality ametrine comes from a remote deposit in Bolivia, where changes during crystal growth produced its distinctive color zoning. When ametrine first appeared on the modern gem market,…

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  3. Rock & Gem

    Tick Canyon Howlite: From Waste to Gem (opens in a new tab)

    Howlite was first discovered in Nova Scotia in 1868 by Henry How, who originally named the mineral silicoboro-calcite. How’s discovery inspired the name howlite. Since then, Tick Canyon in Los Angeles County, northwest of Pasadena, has become a well-known source of this distinctive white mineral, often marked with black or brown veins. The Accidental Discovery of…

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  4. Rock & Gem

    Alien Eye Fluorite Field Guide (opens in a new tab)

    Alien eye fluorite is a rare variety of fluorite from Namibia known for its distinctive green colored, diamond-shaped centers surrounded by dark outer zones. These contrasting bands resemble alien eyes, giving the mineral its unusual name and making it a sought-after specimen among mineral collectors. Under ultraviolet (UV) light, alien eye fluorite can also fluoresce…

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  5. Rock & Gem

    Transylvania Minerals: Gothic Beauty (opens in a new tab)

    Transylvania minerals offer rockhounds a fascinating mix of rare gold tellurides, vivid red realgar, pink rhodochrosite and colorful fluorite. Located in the heart of Romania, Transylvania is known for its Carpathian Mountains, volcanic geology and Dracula legends. Its historic mining districts have also produced notable mineral specimens that helped shape the region’s place in mineralogical…

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  6. Rock & Gem

    Sulfur: Properties, History and Uses (opens in a new tab)

    If elements were rated by their popular image, sulfur wouldn’t have a chance. Just the mention of the word conjures unsettling thoughts of noxious volcanic gases, acrid smoke, odors of decaying organic matter and even the fundamentalist Christian “fire-and-brimstone” concept. But, image problems aside, sulfur has a lot going for it. Widely collected for its…

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  7. Rock & Gem

    Cursed Gemstones: The Black Prince’s Ruby and More (opens in a new tab)

    Cursed gemstones have long been linked to royal deaths, broken romances, and unexplained misfortune. From the Black Prince’s Ruby to the Hope Diamond, these infamous cursed gemstones have inspired stories of tragedy and bad luck while continuing to captivate collectors and gem enthusiasts. The Black Prince and Pedro the Cruel Deposed Spanish king, Don Pedro…

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Headlines and opening paragraphs come from the publishers' public RSS feeds; the full articles, images and copyright remain with each publisher. Jewellery.HK is not affiliated with these publications and does not endorse the companies mentioned. Last collected 4 Nov 2026, 19:07 UTC.