Most star rubies are not diffusion-treated to improve the star, but some are fracture-filled. The treatment is permanent and produces good results. Some natural star sapphires are enhanced by a process that diffuses rutile into the gem to improve the star. It should travel easily across the surface of the cabochon as you move the light back and forth. The star should be centered at the top of the dome, and it should extend across the entire stone. The star should be sharp and clear, and the rays should be straight and evenly spread. Move the light back and forth to see how the star moves across the surface of the stone. The trick is to hold the light about 15 cm (6 inches) above the stone. Gem dealers use a penlight to evaluate star gems. A focused light displays the star best, and all photos you see of these stones will be taken under such lighting. Even very good quality stars show poorly in diffused light. Most natural star gems display a star only in sunlight or in strong indoor light. Since color is also very important in these star gems, cutters try to strike a balance between the star and the body color when selecting their material. More rutile means a more distinct star, but a somewhat muddier color. In fact, there is a trade-off between the distinctness of the star and the saturation of the body color. Star gemstones tend to be opaque or translucent rather than transparent, due to the rutile inclusions. The gem must be cut as a cabochon in order to display a star, and it must have the right proportions neither too flat on the top nor too heavy on the bottom. If inclusions of rutile are densely packed, and aligned in the correct way, then they will reflect light in a multi-rayed pattern, forming a star. So make your first priority as a double and multiple star observer to become. The essential element in producing a star gemstone is the mineral rutile. The folks at Topaz Labs are at it again, continually making great post processing products for the creative photographer. Nearly half of its entries are spectacular double and multiple stars. To fully appreciate the marvel of a natural star gemstone, it is worth understanding how stars form in natural gems, and how best to observe the asterism. But this is not the standard by which natural star gems should be judged. Many people have seen synthetic star gemstones with very sharp stars that display perfectly under any kind of light. Selecting a region changes the language and/or content on -time buyers of these star gems sometimes have unrealistic expectations about how sharp and clear the star should appear. Simulating 2,000+ popular Tiffen glass filters, specialized lenses, optical lab processes, film grain, exacting color correction, plus natural light and photographic effects. ZMatte quickly and simply creates mattes with minimal parameters even if you are dealing with fine hair detail, smoke, or reflections. ReFine performs selective sharpening, detail enhancement, edge aware smoothing, cartoon, and pencil effects. Power Stroke introduces a simple, interactive stroke-based interface to quickly and intuitively perform targeted adjustments.Ĭreate stunning and realistic light ray effects quickly and easily Power Matte is an easy to use interactive image matting tool capable of extracting almost any object in an image-even if you are dealing with fine hair detail, smoke, or reflections. PhotoCopy creates a photographic reproduction of a printed or graphic work made with a process in which a new image is formed by the action of proprietary image analysis, color, texture, and light. Light can be added to a scene where none existed before just as if you were adding light at the time of shooting. DFT (aka Digital Film Tools) is the definitive digital toolbox meant to simulate optical camera filters, specialized lenses, film stocks and grain, lens flares, optical lab processes, color correction, keying, and compositing as well as natural light and photographic effects.ĮZ Mask is an easy to use interactive image masking tool capable of extracting almost any object in an image-even if you are dealing with fine hair detail, smoke, or reflections.įilm Stocks is a unique filter that simulates 288 different color and black-and-white still photographic film stocks, motion picture films stocks, and historical photographic processes.
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