This scale represents the approximate body tone values in equal intervals from colorless, white, through various shades of gray, to black on the body tone scale from N1 to N9.Ĭlarity is the degree to which a gemstone is transparent and free from internal defects. The body tone or colored background of an opal is different from the color and is graded on a tone scale. When light waves strike the silicon beads, they break into all shades of the color spectrum. The secret of this lies in the fact that the stone does not have a crystalline structure, but consists of spherical particles of silica. Catching light at every turn, the stone begins to glow with iridescent tints. Play-of-color (opalescence) is the most important factor in opal evaluation. Opal Quality FactorsĪcording to GIA (Gemological Institute of America) the qualify factors of an Opal are as follow Color, Patter and Clarity.Ĭolor (body tone and play-of-color), pattern (arrangement of play-of-color), clarity (transparency and quantity of inclusions). The most beautiful specimens, after grinding, are used as semi-precious stones. They do not shimmer in the light, painted exactly in pastel colors: beige, pinkish, grayish.
These are some of the most valuable types of stones in the jewelry world. Opals of gem quality most often contain from 6% to 10% water. The percentage of moisture determines the gem value of the mineral. They are translucent or completely transparent, have a variety of colors - from black to bluish-white. Noble (precious) opals shine with all the colors of the rainbow and seem to glow from the inside, these properties are called opalescence. There are two main types of opals: noble and common. In nature, opal takes on a wide variety of shapes, colors and characteristics. In addition, opal is considered a stone that fidelity and purity many newlyweds choose rings with such an insert to symbolize their commitment towards each other. The play of color in this stone cannot be duplicated by any diamond. A stone’s unique pattern will shift depending on what mood you're wearing: light pink or navy blue? Beige lace dress vs black suit – there's no wrong answer when choosing this beautiful gemstone because each hue has its own personality attached. Sometimes you can see the starry sky in these stones as they glitter under light like an endless flow of stars filling up space.Īn opal engagement ring is for those who want their relationship to have some originality- just like them. The stone is beautiful and it seems to have inner life, changing its shade at every turn. They're so unique and fascinates literally everybody at first sight - sometimes it is difficult to find words that can describe just how gorgeous these stones are. Opals have been called one of the most impressive gemstones in the world, and for good reason. Could a stone have a dozen different color shades? Yes!!!.
0 kommentar(er)
