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  2. Diamond clarity - Wikipedia

    en.wikipedia.org/wiki/Diamond_clarity

    Diamond clarity is the quality of diamonds that relates to the existence and visual appearance of internal characteristics of a diamond called inclusions, and surface defects, called blemishes. Clarity is one of the four Cs of diamond grading, the others being carat , color , and cut .

  3. Diamond (gemstone) - Wikipedia

    en.wikipedia.org/wiki/Diamond_(gemstone)

    Diamonds become increasingly rare when considering higher clarity gradings. Only about 20% of all diamonds mined have a clarity rating high enough for the diamond to be considered appropriate for use as a gemstone; the other 80% are relegated to industrial use. Of that top 20%, a significant portion contains one or more visible inclusions.

  4. List of music recording certifications - Wikipedia

    en.wikipedia.org/wiki/List_of_music_recording...

    For albums released between September 25, 1999, and December 31, 2002, the thresholds are 150,000 for Gold and 300,000 for Platinum. Also, for Jazz albums, the thresholds are 10,000 for Gold and 20,000 for Platinum. Diamond-award is applicable to titles released on/after January 1, 2013. [18] ^ IV Hungarian sales figures provided refer to "Pop ...

  5. Music recording certification - Wikipedia

    en.wikipedia.org/wiki/Music_recording_certification

    The "Diamond Award" granted by the Recording Industry Association of America (RIAA) recognizes 10 million units sold in the United States. Below are certification thresholds for the United States, United Kingdom, Canada and France. The numbers in the tables are in terms of "units", where a unit represents one sale or one shipment of a given medium.

  6. Gemological Institute of America - Wikipedia

    en.wikipedia.org/wiki/Gemological_Institute_of...

    Diamond reports from GIA (as well as other, for-profit sources) are now demanded by most consumers purchasing diamonds over a certain size, typically for over 0.5 carat (100 mg), and almost always for over 1.0 carat (200 mg), and are considered an important tool in guaranteeing that a diamond is accurately represented to a potential buyer.

  7. List of highest-certified music artists in the United States

    en.wikipedia.org/wiki/List_of_highest-certified...

    Neil Diamond: US 1960s–2020s [21] 28 49 Alabama: US 1970s–2020s [22] 29 48 Kenny G: US 1980s–2020s [23] Shania Twain: Canada 1990s–2020s [24] 31 47.5 Drake: Canada 2000s–2020s [25] Kenny Rogers: US 1950s–2000s † 33 44.5 Alan Jackson: US 1980s–2020s [26] Bob Seger & the Silver Bullet Band: US 1960s–2020s [27] Guns N' Roses: US ...

  8. Piste - Wikipedia

    en.wikipedia.org/wiki/Piste

    This trail rating is fairly new; by the 1980s, technological improvements in trail construction and maintenance, coupled with intense marketing competition, led to the creation of a Double Black Diamond rating. Triple black diamond: Expert Only These trails are even more difficult than Double Black Diamonds, due to even more exceptionally steep ...

  9. RIAA certification - Wikipedia

    en.wikipedia.org/wiki/RIAA_certification

    RIAA certifications for Prince, Bruce Springsteen, Michael Jackson, Madonna and Lynyrd Skynyrd on display at Julien's Auctions.. A Gold record is a song or album that sells 500,000 units (records, tapes, and compact discs).

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