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Glossary: Useful Terms Relating To Watches & Jewellery
Danburite
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A clear to white silicate mineral whose orthorhombic crystals are transparent to translucent (danburite can also be yellow, greenish, or brown); it resembles topaz.
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Dial
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The “face” of the watch. It can be silvered, engine-turned (synonyms: guilloché, engraved), enamelled, gilded, lacquered, or set with precious stones.
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Diamond
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Precious, lustrous gemstone made of highly-compressed carbon. Diamonds are one of the hardest materials known. Colours of diamonds range from colourless, yellow, orange, brown, to almost black. Rarer colours are red, blue, green, and purple; these colours (called fancies) are quite valuable. Canary diamonds have a deep yellow colour. A diamond's value is based on the "4 C's": colour, cut, clarity, and carat weight. A diamond's colour (saturation) is rated on an alphabetical scale ranging from D (white) to Y (yellow). "Z" are fancy, or deep-coloured. A diamond's cut is designed to maximize the stone's natural "fire"; brilliant cuts are preferred. A diamond's clarity depends on the number and size of its flaws and inclusions of other minerals, like quartz. Clarity can be rated FI (flawless), IF (flawless at 10x magnification), a series of V ratings (very small flaws at 10x magnification), a series of S ratings (small flaws at 10x magnification), to I1, I2, and I3 (having inclusions visible to the naked eye).
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