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Is Boulder Opal valuable?

By: Julio FantasmaUpdated: April 14, 2021

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Value. Valuing boulder opal per carat is not generally accepted in the industry due to the large component of ironstone present in the stone. However, to give a rough indication, top quality boulder opal may fetch prices of up to AUD $3,500 per carat for a gem quality stone.

In this way, how are boulder opals formed?

Opal is formed from a solution of silicon dioxide and water. As water runs down through the earth, it picks up silica from sandstone, and carries this silica-rich solution into cracks and voids , caused by natural faults or decomposing fossils.

Beside above, what is a boulder opal?

Boulder opal is a rock that contains thin seams and patches of opal surrounded by or attached to its natural host rock. The cutter studies this rock and decides how to cut the best possible gem. That gem might be cut to display seams and patches of precious opal as they appear within their natural host rock.

Where do opals come from?

Opal is found around the world (Brazil, Mexico, Honduras and the western US) however Australia produces 95% of the world's precious opal and it is our official national gemstone. (see Google Arts and Culture - Australian opals).

How much is a 1 carat opal worth?

Black Opal prices vary from roughly $30 per half carat, up to $1,500 per carat. This is only the . 5-1 carat range. High quality Black Opals weighing 5-10 carats can cost up to $50,000.

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How can you tell a good quality opal?

You can see which your opal is by looking at the back and side. The highest quality opals are solid "black" opals that aren't really black but have strong reds, blues and greens on a darker background, as opposed to opals you can see right through. the best black opals come from Lightning Ridge in Australia.

How do you care for a Boulder Opal?

Care and Storing:
Boulder opal is highly durable, therefore care and storing is made relatively easy; Cleaning however must be done with caution, and is best to take place with warm water and a soft cloth, though soaking the stone is not recommended.

What color opal is most 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. However, Opal is usually never a single color.

What are 3 different types of opals?

There are many different types of natural opals. There is black opal, white opal, crystal opal and jelly opal. There are other kinds - fire opal, hyalite, water opal, hydrophane and honey opal. Black Opal is the most valued of Opals and comes mainly from Lightning Ridge.

What is the difference between black opal and boulder opal?

Black OpalBlack opal gets its name from its dark body tone, which ranges from dark grey to black. Because boulder opal forms in thin veins in ironstone boulders, the host ironstone is usually left on the back of the stone.

Is Black Opal rare?

Black opals are exceptionally rare in that they are known to form in only one place: Australia. While Australia makes up 90% of the world's opal market, mining these gemstones ethically and responsibly is extremely important due to their rarity.

What is a black opal worth?

Value. By comparison, black opals are the most valuable form of opal – due to their dark body tone and the resulting vibrant play of colour. Top of the range gem quality black opal can fetch prices up to AUD $15,000 per carat.

What is the most expensive Opal?

In terms of polished stone, the Virgin Rainbow, a rare crystal opal that's also owned by the South Australian Museum, is the world's most expensive opal on a per gram basis, valued at $750,000.

What is Blue Opal?

Peruvian opal (also called blue opal) is a semi-opaque to opaque blue-green stone found in Peru, which is often cut to include the matrix in the more opaque stones. It does not display a play of color. Blue opal also comes from Oregon in the Owyhee region, as well as from Nevada around the Virgin Valley.

Is Opal a healing crystal?

Healing with Opal
Opal is an emotional stone and reflects the mood of the wearer. Opal enhances cosmic consciousness and induces psychic and mystical visions. It stimulates originality and creativity. Helps to release anger and claim self worth, aiding in accessing and expressing one's true self.