Semi-Black Opals Contain Every Color of the Spectrum

Opals are graded on a tone scale that ranges from N1 to N9. This scale grades the base color of an opal, which is one of the six factors that is considered in determining the value of an opal. Black opals have a tone grade of N4 or below. They are considered the most valuable forms of opal because the deep gray or black base color allows the fire colors (or the colors that shine out of the opal) to be their maximum brightness. Semi-black opals fall in the range of N5 and N6. These opals have a base color that is slightly lighter than black opals. They are sometimes known as dark opals or grey opals because they have a darker tone than white opals, which have a tone grade of N9.

Semi-Black Opal is the Perfect Gift Choice


Semi-black opal is a less expensive choice than black opal and can be just as unique and lovely. Like other types of opal, semi-black opals can contain virtually every color of the spectrum within them and are known for their beautiful shine and intricate patterns. No semi-black opal is like any other, and they can make a beautiful choice for everyday opal earrings, rings, bracelets, and necklaces. Semi-black opals can also make exceptional evening jewelry with their broad range of colors and unique gleam. The grey base of semi-black opals tends to give them a book that is bright and joyful. The colors held within these opals tend to shine against the grey in a way that evokes a sense of a neon glow or a field of vibrant wildflowers. Semi-black opals can be a perfect choice for a unique set of earrings that brings out the color of your eyes, or a one-of-a-kind anniversary pendant that your wife will treasure for years to come. At Opal by Anderson Beattie, we offer a wide selection of semi-black opals in shapes, colors, and sizes suited to every taste and budget. Browse our current selection of unique opals to find the perfect stone for you.