Membedakan Batu Opal asli dan Palsu
Decide how you plan to wear your opal jewelry. If you plan to wear your opal every day, you should select a bezel setting that will protect the stone. Opals are notorious for "wearing out" of their settings, as the stones are often soft and the prongs simply wear away at the stone over time. So if you decide on a pronged setting, you should make sure it comes with a warranty or periodic maintenance agreement in case of damage to the stone.
- Look carefully at the overall body of the opal for clarity, consistency and lightness with a loupe. Even a dark-colored opal will appear bright and light throughout its body, while a doublet or triplet will look dark and dull because of the backing materials used. The coloring should not be blotchy or excessive as this does not occur in nature.
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Check the coloring pattern within the body of the stone. Unlike the overall color tone of a real stone, which is very natural and consistent, the actual pattern of brightness will be spontaneous and random. Look for recurring, snakeskin-like or uniform patterns for signs of synthetic gems.
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Turn the opal to its side and inspect the sides carefully. If you see obvious and uniform layering lines, the gem is a doublet or triplet. The lines show where the opal layer is bonded to the backing or capping layers.
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Check for striations, which are commonly found on natural stones. These marks are subtle and show the pattern of coloring that is visible inside the stone. If the striations are very straight, evenly spaced or predictable your opal is likely synthetic.
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Look through the rounded top of the opal while holding the stone on its side. If the opal is real, you will not be able to see all the way through. A triplet has a glass dome on top, so if your stone has one, your view through the top will be unimpeded.
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Turn the opal over to inspect the back. If you feel a plastic material on the back of the stone or the gem is very flat and even, you have a doublet or triplet. A real opal will have a smooth back that is slightly irregular in level instead of being flat. You should also be able to see the light of the stone clearly through the backside.
Decide how you plan to wear your opal jewelry. If you plan to wear your opal every day, you should select a bezel setting that will protect the stone. Opals are notorious for "wearing out" of their settings, as the stones are often soft and the prongs simply wear away at the stone over time. So if you decide on a pronged setting, you should make sure it comes with a warranty or periodic maintenance agreement in case of damage to the stone.
Evaluate the shape of the stone. Generally, opals are cut in
symmetrical, rounded shapes, and in the case of high-quality opals
command a per-carat price similar to that of diamonds. If you are
considering making a major investment in a piece of opal jewelry, make
sure the stone has been cut and polished in such a way that the colors
are shown to their best advantage. Naturally shaped opals also make
striking pieces of jewelry, but they should not cost as much as a
professionally shaped stone.
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Select a color. Opals showcase many colors, but most tend to
have one dominant hue, such as milky white, black or even red. The more
colors a stone has, the more valuable it will be.
Examine the opal for fire and rainbow brilliance. Opals can
have inclusions and flaws just like diamonds, and these irregularities
decrease the amount of fire that an opal displays. If there is a large
cloudy or milky patch that does not emit any flashes of color even when
the opal is moved around in good light, this is likely an inclusion and
diminishes the value of the gem.
Although they are often somewhat opaque, opals can be rated
on clarity, or the interior sparkle of the gem. Some opals are more
crystalline than others, meaning that you can see some degree of light
through them. They tend to be more valuable than fully opaque stones.
Moderate valuable: Opal ini memiliki kualitas yang sama dengan opal yang di atas, tetapi lebih berharga karena lebih besar. The play of color is weak (memiliki warna yang sedikit) dengan warna putih yang dominan. Opal ini memiliki corak pin fire walaupun sedikit. Bila di nilai dari corak maka termasuk least valuable.
High Value: Opal seperti ini paling di cari oleh opal lover. Specimen yang sangat nice dari opal kristal atau opal putih. Dengan permainan warna ungu dan merah yang sangat kuat, serta memilliki ukuran yang besar, sehingga dapat berharga beberapa ribu dollar
Most Valuable: Ini adalah opal yang sangat indah. Dan lebih berharga lagi karena ini adalah Black Opal dan memiliki permainan warna yang sempurna dengan warna merah yang mencolok. Ini adalah contoh dari corak harlequin opal. Most Valuable corak. Dengan ukuran lebih dari 10 karat, opal seperti ini berharga ribuan dollar.
Opal besar ini memiliki banyak permainan warna. Warna ini membentuk corak “harlequin” corak yang plg berharga. Tetapi masih perlu di poles lagi karena permukaan tidak berkilau seperti seharusnya.
Ini adalah salahsatu contoh jelly opal. Sebenarnya tidak tergolong langka. Permainan warnanya kurang dan terlihat terlalu berair. Opal seperti ini less common dalam perhiasan, walaupun sekarang ini lagi populer untuk di potong facet.
Ini adalah contoh corak Flash. Corak seperti ini di kategorikan moderate value pattern. Karena memiliki warna merah yang kuat menjadikannya berharga.
Ini adalah opal kuning mexico dengan warna yang bagus. Opal ini memiliki kelas yang sama dengan jelly opal. Tidak terlalu langk dan menampilkan permainan warna air. Opal ini telah di potong Faceted, seperti yang lagi populer. Opal faceted lebih mudah tergores karena opal soft.
Ini adalah black opal dengan permainan warna yang sempurna dengan warna merah dan corak dinamik. Corak seperti ini tidak bisa dinilai secara objective. Karena setiap orang yang melihatnya memiliki penilaian corak yang berbeda. Jika melihat opal seperti ini, jgn di lewatkan.
Ini adalah Opal fire mexico. Sama dengan opal kuning diatas, tidak terlalu langka dan feel watery. Opal ini populer karena warnanya yang glowing dan vibrant.
Less valuable: Opal ini hanya terdiri dari biru gelap dan h ijau dan hijau, 2 warna yang plg umum dan least valued. Harga dari opal ini sekitar ratusan dollar.
Moderate value: Di sini kita bisa melihat beberapa warna biru dan hijau yang mana menaikkan nilai dari batu tersebut
High Value: Opal ini tidak hanya memiliki beraneka ragam bayangan dari war biru dan hijau, tetapi juga warna kuning yang kuat dan pink yang tersembunyi. Warna tambahan ini yang membuat opal ini lebih berharga dari yang diatas.
Most Valuable: Opal ini penuh dengan warna spectru,. Opal seperti ini jarang di temukan dan berharga ribuan dollar.
Info yg berguna... Mba sendiri punya opal yg mn? Btw thx infonya:D
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