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  2. Foil opal - Wikipedia

    en.wikipedia.org/wiki/Foil_opal

    Foil opals are simulated opal gemstones that first came into vogue during the jewelry-making boom of the late-Victorian era. Across Europe and the United States, these faux gemstones joined their paste counterparts (simulated diamonds, emeralds, rubies and sapphires made from glass) as the need for jewelry outstripped both gemstone availability and nouveau middle-class budgets.

  3. Costume jewelry - Wikipedia

    en.wikipedia.org/wiki/Costume_jewelry

    Swatch Bijoux Jewelry. Costume or fashion jewelry includes a range of decorative items worn for personal adornment that are manufactured as less expensive ornamentation to complement a particular fashionable outfit or garment [1] as opposed to "real" (fine) jewelry, which is more costly and which may be regarded primarily as collectibles, keepsakes, or investments.

  4. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    Opal. Fire opal; Moss opal; ... There are a number of artificial and lab grown minerals used to produce gemstones. These include: ... 2 Artificial and lab created. 3 ...

  5. Jewellery - Wikipedia

    en.wikipedia.org/wiki/Jewellery

    The most significant archaeological evidence comes from the Royal Cemetery of Ur, where hundreds of burials dating 2900–2300 BC were unearthed; tombs such as that of Puabi contained a multitude of artefacts in gold, silver, and semi-precious stones, such as lapis lazuli crowns embellished with gold figurines, close-fitting collar necklaces ...

  6. Slocum stone - Wikipedia

    en.wikipedia.org/wiki/Slocum_stone

    Slocum Stone is a silicate glass which shows traces of sodium, magnesium, aluminum and titanium. [6] It was manufactured in several base colors, and the opalescence is produced by very thin layers of metallic film (estimated at 30 nanometres in thickness [ 7 ] ), in the form of translucent flakes, which produce a thin-film interference effect.

  7. Navaratna - Wikipedia

    en.wikipedia.org/wiki/Navaratna

    Thailand's "Queen Sirikit Navaratna" necklace.. Navaratna (Sanskrit: नवरत्न) is a Sanskrit compound word meaning "nine gems" or "ratnas".Jewellery created in this style has important cultural significance in many southern, and south-eastern Asian cultures as a symbol of wealth, and status, and is claimed to yield talismanic benefits towards health and well-being.