As the blue turns to blue-green or green-blue with a very dark or black background, the stone can then sell up to around $250 per carat.

How do I value my opal?

The value of an opal depends on many factors. The type of opal, body tone, brilliance, pattern, colour bar thickness, the play of colour, and faults all play important roles in determining the value. Other important factors include the quality of the cut & polish, and the size of the stone.

How much is opal worth per carat?

Once categorized, opals are sold in price per carat, or weight. Because there are so many opal fields in Australia, there really is no singular form of opal. This means that opal costs can vary from about $10 per carat to approximately $6,000 per carat.

Are blue opals valuable?

Red is the rarest and most sought out color. In order of value, the most valuable color is red, then orange, green, blue and purple. Also electric blue Opals are more valuable as the hidden color bar makes the Opal brighter than the normal blue. Density and intensity of color is also important to determine the price.

What is the rarest opal color?

Black opal
Black opal is the most rare and highly valued form of opal, and has what is called a black (or dark) body tone. Black opals come in every colour of the rainbow.

How can you tell a real opal?

Most genuine solid opals have an irregularity in this area – curved or bumpy due to their natural formation – whereas a man-made stone will be perfectly flat because the two sections are flattened so they can be glued together. Be especially wary if the opal is set in jewellery and you cannot see its back or side.

What type of opal is most valuable?

Black opals
Black opals, such as those from Lightning Ridge, are generally considered the most valuable because the rest of the vibrant spectrum colors and their patterns show better with the black background. The 687.5-carat “Blue Lagoon” opal with a “Sheen” opal pattern.

Is opal worth more than diamond?

The value and rarity of a gemstone directly relate to supply and demand. Both diamonds and opals are common, but that isn’t to say that all diamonds and opals are created equal. Because the value of most diamonds will be higher than opals, while high-quality opals are rarer than diamonds.

Are opal doublets worth anything?

Opal doublets are generally cut to show off the most impressive part of the Opal and with the dark back enhancing the colours it can make for a great looking stone. While they are not necessarily worth less then a full Opal, they can also be a cost effective way of owning a lovely looking Opal.

Which is the most valuable colour of an opal?

The ‘dominant colour’ in an opal can affect its value, with red commanding the highest cost, followed by orange, yellow, green, blue, indigo and violet. However, do not forget, a blue-green brilliant stone will be more valuable than a dull red. In some rare cases, the diffraction of light within an opal can cause interesting patterns to arise.

How much is the Opals collection on sale for?

The asking price for the collection is $10.8 million. Gracie Hays, a gemologist, is the representative for the seller. She and her husband, Gregory, owns The Gem Garden jewelry store in San Marcos, Calif., and separate gem cutting and jewelry design businesses.

Where does the Blue Opal Stone come from?

Its mystical brightness gives it an air of elegance that is hypnotizing for those who approach this stone. The blue opal is a mineral with a composition similar to that of quartz, but with water molecules inside. The Greeks believed that it came from the tears of Zeus’ luck after his victory against the Titans.

What’s the difference between red and yellow fire opal?

Additionally, red fire opal’s price is typically higher than the price of yellow specimens. Fire opal is prone to damage from everyday wear, due to its low hardness on Mohs scale – around 6 to 6.5.