Unlike diamonds, which are graded using a universally accepted standard, pearls have no recognized standard for grading quality and value. The information described here is a brief explanation of the various classes of pearls and how JOIA De Majorca is an important element of this market. Because natural and cultured come in an infinite variety of qualities, with varying factors, the criteria described is only a guide.
Size, shape, surface luster, texture, color and uniformity, or matching, of natural or cultured pearls are all factors of the pearl's price. The illustration below shows how the value relationship is in direct proportion to price, assuming the factors described remain consistent.