OPAL MINING – Lightning Ridge

Name: OPAL MINING - Lightning Ridge
SKU: SD-923345-4-2-2-1
Price: 50.00 USD
Availability: InStock

$50.00

How Opal Is Valued In Lightning Ridge, Australia

At Lightning Ridge in Australia, they have a committee that values opal miner’s opals each Saturday. Several experienced opal valuers will price the opal per carat and the final value will be determined by the average price per carat. The above factors can vary from person to person and that is the reason you may see variation in price per carat amongst miners.

SKU: SD-923345-4-2-2-1 Category: SHARE THE WEALTH OF MINING

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How Opal Is Valued In Lightning Ridge, Australia

During this article if you are not sure of any of the terms, checkout our glossary for an explanation on just about everything spoken in the Opal world.

COLOR

Color is the first thing that you will notice about an opal. 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. However, Opal is usually never a single color. It is important to decide what the dominant color is followed by any secondary colors. Use the dominant color as the color that will affect the price.

Some Opals of note would be the red Opal with a purple hue color bar hidden inside. This will create a deep majestic red color. 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. The thickness of the color bar can help to amplify the brilliance of the Opal color. Seam Opal generally has a thinner color bar than opals formed in a knobby.

DIRECTION OF COLOR

Opals are a gemstone that dramatically change appearance based on what angle the Opal is viewed at. When an Opal is at it’s brightest, this is called ‘facing’. The direction of color can affect the price becuase it will determine how versatile the Opal is. If it only faces in one direction, it may only be suitable for a Pendant for example.

Opals that face with strong fire from all directions make good ring stones. These Opals are very versatile and are more valuable than one directional opal. A fine quality Opal will look good no matter what direction it is viewed at.
An opal that faces in one direction is ideal to make into a pendant. The jeweler will set it in the right direction so as to show as much of the fire as possible.
Some multi-color opals might have 1 or 2 strong colors that have different directional faces and these can be hard for jeweller to set.
Dead spots are when no color is visible from a certain angle. These will lower the overall value of the Opal.

PATTERN

Opals that have a rare or unique pattern are more valuable. The Harlequin pattern is the rarest and most loved pattern in opals but it is very rare. A True harlequin pattern is a mosaic broad pattern, angular close set of colors. Floral patterns are sometimes called floral harlequin.

Some top patterns are Mackerel, Block, Broad flash, Rolling flash, Pinfire, Rainbow and most sought out Ethiopian opal is the Honeycomb pattern. Opals that have no or only slight pattern are generally less valuable.

BODY TONE

The Opal Body Tone Guide was endorsed by the Opal Association of Australia and was intended to be a guide for Black Opal and Boulder Opals. It is now generally excepted for all opals worldwide. Opals are grouped in 9 sub categories N1 to N9 with N1 the darkest opal and N9 the lightest.

Black opals are generally the most valuable and have a body tone of N1 to N4
Opals with N5 to N6 considered a semi black or dark opal.
Body tone N7 to N9 are called crystal opals.

BRIGHTNESS

The Opal brightness guide was produced by the Australian opal association along with the body tone guide. There are 7 sub Brightness ratings with B1 the brightest to B7 the dullest. The brighter the Opal, the more expensive will be its value.

SHAPE

Oval stone are generally considered more valuable than free form, except with boulder opals where free form is considered desirable. The shape of the Opal once again determines how versatile it is. Oval stones generally have the best face of color and can be used in a variety of applications.

Opal is almost always cut in a cabochon. A cabochon stone is more valuable when it has a high dome compared to a a flat stone. This is due to the fact that cabochons make ideal ring stones but flat stones are less desirable because they cannot be used in many jewelry designs.

INCLUSIONS

Inclusions and potch lines and are not to be confused with cracks. A crack line reflects light and greatly devalues an Opal. It is worth reading about the difference between crazing and cracking in an Opal.

A potch line has no light reflection and these opals are generally valued lower but can make artistic picture patterns.

Some Opals will have a vegetation pattern from the inclusions and this is popular as the opal has replaced some of the tree or vegetation. Sand or windows also reduce the value of the opal. A window is a gap on the bottom where potch has not formed and opal is transparent.

Ethiopian opal can have a ghost or phantom inclusions or vegetation matter. These types of inclusions are generally accepted as reasonable in this type opal.

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OPAL MINING – Lightning Ridge

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