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  2. Wedding ring - Wikipedia

    en.wikipedia.org/wiki/Wedding_ring

    A wedding ring is commonly worn on the ring finger. A pair of wedding rings. A wedding ring or wedding band is a finger ring that indicates that its wearer is married. [1] It is usually forged from metal, traditionally gold or another precious metal. Rings were used in ancient Rome during marriage. [2]

  3. Hierarchy of precious substances - Wikipedia

    en.wikipedia.org/wiki/Hierarchy_of_precious...

    The measurement of sales of popular music starts high relative to the wedding anniversary scale, concentrating on gold and platinum (see gold album).Likewise, credit card companies usually have a "gold card" and a "platinum card" (many formerly had a "silver card" then followed by a "gold card", but due to similarity in appearance between silver and platinum these were often discontinued with ...

  4. Colored gold - Wikipedia

    en.wikipedia.org/wiki/Colored_gold

    Rose gold jewelry is becoming more popular in the 21st century, and is commonly used for wedding rings, bracelets, and other jewelry. Although the names are often used interchangeably, the difference between red, rose, and pink gold is the copper content: the higher the copper content, the stronger the red coloration. Pink gold uses the least ...

  5. Tungsten - Wikipedia

    en.wikipedia.org/wiki/Tungsten

    Its density, similar to that of gold, allows tungsten to be used in jewelry as an alternative to gold or platinum. [21] [100] Metallic tungsten is hypoallergenic, and is harder than gold alloys (though not as hard as tungsten carbide), making it useful for rings that will resist scratching, especially in designs with a brushed finish.

  6. Engagement ring - Wikipedia

    en.wikipedia.org/wiki/Engagement_ring

    Three-stone diamond engagement rings, sometimes called trinity rings or trilogy rings, are rings with three matching diamonds set horizontally in a row with the bigger stone placed in the center. The three diamonds on the ring are typically said to represent the couple's past, present, and future, but other people give religious significance to ...

  7. Platinum - Wikipedia

    en.wikipedia.org/wiki/Platinum

    Platinum(IV) oxide, PtO 2, also known as "Adams' catalyst", is a black powder that is soluble in potassium hydroxide (KOH) solutions and concentrated acids. [41] PtO 2 and the less common PtO both decompose upon heating. [13] Platinum(II,IV) oxide, Pt 3 O 4, is formed in the following reaction: 2 Pt 2+ + Pt 4+ + 4 O 2− → Pt 3 O 4

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