We are known for producing and supply of Australian Fire Opal, White Opal, Crystal Opal in free and calibrated sizes. Firstly, we do not deal in Opal from any other country and also not in any other gem stone. Secondly, we differentiate our company from other manufacturer in the field of Opal through purity and quality of finished product. We have best of the stone cutting and polishing workers who has family legacy in this field for last 100 years.

The key to any Australian opal is cutting and polishing to showcase the maximum fire on both side.
The best quality opal is mined in Australia but best hand polished in India by workers of Seven Opal.
Our company has strong presence in South Australia for Opal. Miners in South Australia are directly part of the company for supply of best quality rough Opal.
The company has unique selection methods, cutting and polishing of opal to give you best Opal.

We work on seven basic factors of Opal stone,

It determine the type of Opal. It is a black opal, white opal, crystal opal or boulder opal
Play of Color:Opal hues can range across the spectrum. An opal might display a single color, two or three colors, or all the colors of the rainbow. Opal >displays background color in addition to play-of-color. Background color—also called bodycolor—is caused by the suspension of tiny impurities within opal’s silica spheres. Opals are often divided into types based on background color. Some background colors tend to be more prized than others. All other quality factors being equal, many buyers favor the black background color. This is partly because play-of-color tends to stand out attractively against a dark background.

Play-of-color might be the most spectacular aspect of an opal’s appearance. No matter the color or combination of colors, play-of-color must be vivid to command a high rating. In other words, opal lovers prize bright play-of-color over faint play-of-color.

With an opal, clarity is its degree of transparency and freedom from inclusions. An opal’s clarity can range all the way from completely transparent to opaque. Experts prize different levels of clarity for different opal types. For example, in crystal opal, experts admire transparency, while in black opal they prefer an opaque background. Each provides the best background for displaying play-of-color in its individual opal type. A cloudy or milky background color lowers the value of any opal. It makes the gem less attractive, and it can sometimes signal a lack of stability.

There are various types of opal clarity characteristics that affect value. Opals, like other gems, can have fractures, or pits and other surface blemishes. An opal might also contain fragments of its host rock, called matrix. Matrix in a polished opal is usually—but not always—detrimental to its appearance and value. It depends on the type of opal.

If an opal loses moisture, it can lead to crazing:

a fine network of cracks that resembles a spider’s web. The moisture loss can be caused by heat or excessive dryness, or by exposure to bright light or direct sunlight. Crazing can be prevented by never displaying opals in places— such as window displays—where they’re exposed to these conditions

The cutter considers an opal’s color, pattern, and clarity when planning the finished gem. As with many top-quality colored stones, exceptional opals might not be cut to standard sizes and shapes.
Cutters usually fashion exceptional rubies or sapphires, for example, in a way that saves weight or maximizes color— even if the result is an unevenly proportioned gem. In a similar strategy, opal cutters usually cut top-quality rough to show off its spectacular play-of-color.

To achieve this goal, cutters might fashion fine opals into large, irregular shapes that keep as much play-of-color as possible. Designers set these costly one-of-a-kind gems into custom pieces.

On the other hand, cutters typically fashion commercial-quality white opal and assembled opal into standard calibrated sizes, usually ovals.

The cut of a fine opal should be symmetrical. If it’s a cabochon, the dome should be well rounded. Domed surfaces give the best play-of-color, and make the stone appear vivid from most viewing angles. If the cabochon is flat, it might be vulnerable to breakage, especially during setting into jewelry. If it’s too high, it might be hard to set in jewelry.

Pattern:

Pattern describes the arrangement of an opal’s play-of-color. Like the shapes you see in the clouds, play-of-color takes many forms.
Common terms for play-of-color patterns include.

Pinfire or pinpoint:

Small, closely set patches of color

Harlequin or mosaic:

Broad, angular, closely set patches of color

Flame:

Sweeping reddish bands or streaks that shoot across the stone

Peacock:

Mainly blue and green In general, connoisseurs prefer large, closely arranged patches of color over tiny, scattered dots. As with any play-of-color, no matter what the pattern, colors must be bright for the stone to be valuable.

Carat:

Opals come in a wide range of sizes and carat weights. Opal has relatively low density compared to many other gemstones so even larger sizes can be comfortable to wear.
Common sizes for many of the opal cabochons set in jewelry are 6×4, 7×5, and 8×6 mm.

Shape:

The opals are cut and shaped according there natural fire and shape is kept natural as of the natural stone.