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  1. Gem-A

    Gem Knowledge: What Are the ‘Cardinal Gems’? (新しいタブで開きます)

    If you’ve ever heard the phrase ‘cardinal gems’ and wondered what this means, now’s your chance to find out. Gem-A Gemmology Tutor Pat Daly breaks down this historic term and explains how the concept has stood the test of time. The term ‘cardinal gems’ may be used to spotlight five stones – diamond, ruby, sapphire,…

    Gem-Aで記事全文を読む (新しいタブで開きます)
  2. Gem-A

    Fluorescence in Diamonds (新しいタブで開きます)

    Diamonds are the best known and are among the most popular stones in the jewellery trade, having been valued for more than 2,000 years. If you have heard about diamonds fluorescing under ultraviolet light but don’t quite know what this means, how it’s relevant to gemmologists, or why it matters to diamond collectors, Pat Daly FGA DGA is here…

    Gem-Aで記事全文を読む (新しいタブで開きます)
  3. Gem-A

    Beginner’s Guide: The 8 Most Popular Diamond Cuts and Faceting Styles (新しいタブで開きます)

    When we look at faceted gemstones, we see and appreciate their colours, transparency, brilliance and fire. What we sometimes take for granted, however, is the fashioning that makes it possible to enjoy these visual effects. To explain more, Gem-A Gemmology Tutor Pat Daly has created this useful introduction to diamond cut and shape, incorporating faceting…

    Gem-Aで記事全文を読む (新しいタブで開きます)

見出しと記事冒頭部分は、各配信元が公開しているRSSフィードから取得しています。記事全文、画像、著作権は各配信元に帰属します。Jewellery.HKはこれらの媒体と提携関係になく、記事内で言及される企業を推奨するものではありません。 最終収集日時:4 Nov 2026, 20:07 UTC。