Announcement

Collapse
No announcement yet.

Pearl Sizes

Collapse
X
Collapse
  •  

  • Pearl Sizes

    Pearl Size Is Measured in Millimeters

    A pearl's size is measured according to its diameter in millimeters. Sizes range from 1 millimeter or less, in the case of very tiny pearls, to as much as 20 millimeters (more than 3/4") for large South Sea pearls.

    The Average Pearl Size Today is 7 Millimeters

    Most pearls sold today, however, are in the 7.0 to 7.5-millimeter range. Akoya pearls greater than 8 millimeters are considered extremely rare. (The largest pearl an akoya oyster can produce is around 9 or 10 millimeters.) Pearls larger than 10 millimeters are generally not akoya pearls, but are instead: Tahitians, South Sea pearls, or large freshwater pearls.
    Click image for larger version  Name:	6-mm-vs-12-mm-pearls.jpg Views:	1 Size:	36.5 KB ID:	449873
    A 6 mm and a 12 mm pearl. Image courtesy of PearlParadise.com.

    The Larger the Pearl Size, the Greater the Value

    Generally speaking, the larger the size of the pearl, the greater its value (all other factors being equal.) Larger pearls not only require larger oysters to produce them, but they require much more time to develop inside the oyster. An "average" pearl can take 2-3 years to develop. Significantly larger pearls can take twice as long. In addition, because it is difficult to maintain a perfectly spherical shape while the pearl develops, large round pearls are extremely rare and valuable.

    Pearl Sizes will vary in Strands

    When shopping for pearls it is important to note that strands are rarely of uniform size. The internationally recognized standard for measuring akoya pearls will always have a .5 mm differential within an individual strand. Per industry standards today, a strand measuring 7.5 mm will actually be composed of pearls measuring 7-7.5 mm. This should be noted in any appraisal or description of the pearls. The smaller pearls will be located near the clasp, and the larger pearls will be in the center of the necklace. This is considered a uniform strand, not a graduated strand.

    Freshwater Pearl Sizes are measured in Full Millimeters

    Freshwater pearls are more often given a full millimeter range of size. For example, a strand of 8 mm freshwater pearls may be measured 7-8 mm in size. This is not an absolute standard, however, as many high-quality freshwater pearls are sized similar to akoya pearls with a mere .5 mm differential.

    Pearl Sizes In Some Strands May Be Slightly Graduated

    Tahitian and South Sea pearls are typically measured individually, but to be considered a uniform strand there may still be up to a 1 mm differential from the clasp to the center of the necklace. For example, a 9-10 mm strand of Tahitian pearls is considered a uniform strand, but an 8-10 mm strand is considered slightly graduated.

    Related Articles and Forum Threads:
    Last edited by CortezPearls; 03-15-2021, 02:58 PM.
      Posting comments is disabled.

    Categories

    Collapse

    article_tags

    Collapse

    Latest Articles

    Collapse

    • The Genus Pteria Scoppoli 1777
      by CortezPearls
      The family Pteriidae is composed of three or four genera, and pearl oysters belonging to the Pinctada and Pteria genera are -of course- the most important from our point of view.

      Taxonomy

      An old name for this species is Magnavicula, which means “Large Wing”, with the “new” -Pteria- name originating after the Greek word “Ptero” which translates into “wing”, hence the name of “Winged oysters”.

      These species are identified by...
      06-18-2021, 06:03 PM
    • The Sustainability Corner – Issue 2
      by CortezPearls
      Sustaining Life with Pearl Farming

      One of the most important aspects of pearl farming is its inherent ability to protect and create more life than the one that was available previously. And what do I mean by this? When you start a pearl farm in a location, you begin with a resource that has already been “pillaged & plundered”, probably for hundreds, if not thousands, of years. As an example, we have the pearl fisheries of the Persian Gulf -whose pearls were adorning...
      06-09-2021, 11:34 PM
    • A review: The History of Pearls in the Gulf of California, Mexico Part 4
      by CortezPearls
      ENVIRONMENTAL AND SOCIAL IMPACT OF THE CCCP

      There was a positive ecological aspect of this venture: the pearl farm itself acted as a gigantic breeding station for the pearl oysters. When you consider that this farm contained between 8 to 10 million pearl oysters and let us say that at least one-third of these had reached ****** maturity (2.6 to 6.6 million individuals), it is very evident to see the astounding positive impact that this commercial operation would have in restocking...
      05-27-2021, 01:40 AM
    • A review: The History of Pearls in the Gulf of California, Mexico Part 3
      by CortezPearls
      THE FIRST COMMERCIAL PEARL OYSTER FARM IN THE WORLD

      It is at this particular crossroad that we find a Mexican-French Medical Doctor by the name of Gastón Vivès, attempting what very none had tried before: initiate a commercially viable, large-scale pearl oyster farm to produce shell and pearls. The Vivès family owned a pearl fishing armada in La Paz, Baja California Sur, and they were experiencing diminishing profits every year, thus wanting to revert this trend we find Gastón Vivès...
      05-08-2021, 05:20 PM
    • A review: The History of Pearls in the Gulf of California, Mexico PART 2
      by CortezPearls
      The arrival of the Iberian Conquerors

      The Native Nations had no real interest in establishing a commercial venture in pearl fishing and we understand little to nothing of the way they fished for pearls, since most of the information was either lost or destroyed during the conquest of Mexico. The rich plunder of the Conquistadores was sent to Spain and later dispersed all over Europe. The most significant information we have on the subject comes from the period of colonization of northwestern...
      04-05-2021, 03:26 PM
    • A review: The History of Pearls in the Gulf of California, Mexico - PART 1
      by CortezPearls
      A review: The History of Pearls in the Gulf of California, Mexico
      By Douglas McLaurin-Moreno


      Since unrecorded time, man has obtained many bounties from the world’s oceans: food, shells, corals, sponges, seaweeds, and the most desirable of all of these were the beautiful mother-pf-pearl shells and their valuable treasure, Pearls.

      Mexico has four species of pearl oysters inhabiting its coasts, two -the larger sized- on the Pacific side: the Panamic Black Lip...
      03-18-2021, 03:04 PM
    Working...
    X