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Colorless diamond is a precious gemstone rating 20/1000. Although the crystal is quite common the market tightly controls the distribution. Gem are of all sizes. Diamond regular shapes are best and good cutting important. Best depth is ideal with accurate facets. Worst is shallow. Diamond has varying 'fire' from exceptional down. Best clarity is clear which is most rare. Not many external flaws. Usually cut clean. Hard gem. Internal inclusions can be many and can change the value accordingly. Colorless diamonds are used as support gems for jewelry. Cheaper gems including sapphire and zircon are used. Smaller diamonds usually sold graded per carat weight by point one to point four as per other smaller clear gems. Size of gem exponential to price. Large diamonds will usually be in very expensive settings with clear diamonds as surrounds. White gold or platinum. Look particularly for necklace or ring. Also vintage, heritage etc. Gem value: please submit your form.

MARKET NEWS:
These gems are generally not rare. A few of the best of the best are. If all the available diamonds were released to the market the price would plummet. Certainly well below ruby and sapphire. The fact is they have been, and are kept artifically high by the cartels involved in their distribution. They are also heavily advertised. Therefore 99% of commercial natural diamonds are overpriced. Clean and pure hued red, blue and pink colored diamonds are very rare and worth the money. Secondary hues are not. There are many grades with only those experienced traders aware that included diamonds can be purchased cheaply and sold commercially in jewelry well above their price. Diamonds can also be treated to make them more saleable. Look for certificates and bargain heavily.

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Colorless Sapphire is a semi-precious gemstone rating 150/1000. A form of mineral corundum which also includes ruby. Best common shape is oval or cushion although any regular cut is OK. Any colorless gem over three carats is rare. Best depth is ideal. Worst is shallow. Fine sapphire has superb 'fire'. Dull specimens usually too dark or cloudy. Best clarity is clear which is very rare. Sapphire is often free from external flaws but many are cut to maximize size. Internal inclusions are common in this naturally mined gemstone and may include silk, crackling . Lesser specimens are generally heat-treated, diffusion-treated or irradiated to enhance color. Signs of treatment include silk that intersects the surface and artificial crackling. Artificial sapphire is too clear and looks too good to be true. Size of gem exponential to price. Colorless Sapphire is often a support gem for rings etc. It is often used instead of diamonds. More expensive than cubic ziconia but not as expensive as dismonds. Usually sold graded per carat weight by point one to point four as per diamonds. Gem value: please submit your form.

MARKET NEWS:
Purchased in packets usually ungraded. Graded costs more. Great alternative to diamond for larger pieces. Readily available.

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Colorless Spinel is a semi-precious gemstone rating 210/1000. Best spinel usually from Northern Burma. Clear spinel sometimes confused with sapphire but has single refraction and appears very vitreious (glass like). Best common shape is oval or cushion although any regular cut is OK. Best depth is ideal. Worst is shallow. Large windows are poor. Fine spinel has superb 'fire'. Best clarity is clear which is common. Usually a very clean gem. Spinel is often free from external flaws but many stones are cut to maximize size. Internal inclusions are unusual in this naturally mined gemstone and may include silk, crackling . No known enhancements for spinel. Size of gem exponential to price. Colorless spinel are sometimes used as support gems for jewelry. Cheaper gems including zircon are also used. Smaller spinel usually sold graded per carat weight by point one to point four as per other smaller clear gems. Spinel will usually be in many settings such as rings necklaces or earings. Usually of white or yelllow (17ct. + gold). Look particularly for items with expensive diamond settings. Heritage and classic settings with bright red or blue spinel are worth closer examination. Gem value: please submit your form.

MARKET NEWS:
Rare but great for jewelry. Larger pieces used instead of diamonds. Hard clean gem.

colorlesstopaz

Colorless Topaz is a semi-precious gemstone rating 980/1000. Fairly common. Normal Topaz color is bright pink to red pink. Poor specimens too light or pastel colors. Heat treatment is common for yellowish stones, with light blue or colorless stones being subjected to x-ray treatment and heating. Best cut shape is regular. Often cut with many diamond shaped facets (Portuguese cut). Best depth is ideal or fine. Worst is shallow with large window. Topaz has varying 'fire' depending on cut. Best clarity is 'clear' which is the most common. Topaz is usually free from external flaws as crystal is usually large . Internal inclusions are usually rare. Very big, clean crystals are common. Size of gem exponential to price. Topaz will usually be in many settings of many stones such as necklaces and broaches. Topaz prices subject to noticeable variation due to fashion trends on local markets. Usually of silver. Look particularly for more modern items in colorful settings. Gem value: please submit your form.

MARKET NEWS:
Not expensive. Mostly purchased to be ultimately treated for color. Specialists.

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Best cut shape is regular. Best depth is ideal or fine. Rating 760/1000. Worst is shallow with large window. Tourmaline has good 'fire' depending on cut. Some dull specimens especially those of dark shades. Best clarity is 'clear' which is the most common. Tourmaline is usually free from external flaws . Internal inclusions are usually needles, color banding, crackling, light and dark discolorations. Less value if heat treated. Size of gem exponential to price. Colorless Tourmaline is usually small and will be used in rings, broaches, necklaces etc. usually of silver, white gold or gold (9 to 17ct. gold). Look particularly for more moden items colored gem settings. Gem value: please submit your form.

MARKET NEWS:
Another gem available in packets for general use in the trade. Mostly graded.

colorlesszircon

Zircon is a semi-precious gemstone rating 550/1000. Fairly common. Colorless rated 50/100. Zircon exist in a wide range of colors, but the most expensive stones are deep blue, purple, red and orange. White zircons are also valuable, probably due to their extremely high 'diamond-like' refracting properties. Poor specimens too light or pastel colors. Best depth is ideal or fine. Worst is shallow with large window. Zircon has great 'fire'. Some dull specimens especially those badly cut. Best clarity is 'clear' which is the most common. Zircon is very brittle so care is needed in handling. Brownish stones from Cambodia are usually heated to obtain an intense blue color. Heat treatment is common for yellowish stones, with light blue or colorless stones being subjected to x-ray treatment and heating. Internal inclusions are usually rare. Clean crystals are common with less value than the brightly colored gems. Size of gem exponential to price. Zircon will usually be in many settings of many stones such as rings, necklaces and broaches. Prices subject to noticeable variation due to fashion trends on local markets. Usually of white or yellow gold. Look particularly for rings in clear gem 'closed' settings due to the fragile nature of the gem. Gem value: please submit your form.

MARKET NEWS:
Better alternative to diamond for larger sizes although colorless zircon can be treated (in larger sizes) so is not often seen. If ordered specially then expect to pay.

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