Cambodia Gem
Blue Zircon Gems
There are relatively few gemstone varieties with good hardness and brilliance that occur in the color blue. Sapphire is the most famous, and is found in the full range of blues, from the palest blue to blue-black. Blue topaz, produced by irradiating colorless topaz, is the most popular of all blue gemstones, since it is widely available at attractive prices and is found in light and medium-dark tones. Other choices in blue include tanzanite (violet blue) and aquamarine (light blue). Tourmaline and spinel can sometimes be found in blue, but only rarely.
The most brilliant blue gemstone is undoubtedly zircon, which has a higher refractive index than even sapphire, tanzanite or spinel. But zircon is not well known by the general public, who are apt to confuse it with cubic zirconia, a synthetic diamond simulant. Zircon is a natural mineral, zirconium silicate, and is found in a range of colors, including white, blue, yellow, orange, brown, rose and green.
Blue zircon, the most popular color, is produced by heat treatment of brown zircon. But not all brown zircon will turn blue when heated; only some zircon has the right physical structure to turn blue when heated. This is why most blue zircon comes from Cambodia or Burma.
Blue zircon has some unique properties that make it very popular with gemstone aficionados. Not only does zircon have outstanding brilliance, but it also has very strong dispersion or fire, the tendency to split white light into the spectral colors. Zircon also has very pronounced birefringence or double refractivity, where the difference between the two refractive indices is unusually high. This can be often be observed with the naked eye when you look down through the table of a cut zircon: you will observe facet doubling that makes the facet edges looked blurred.
Though blue zircon is a reasonably hard gem, with a hardness on the Mohs scale of about 7 to 7.5, it is somewhat brittle and therefore sensitive to knocks and pressure. Zircon has the tendency to wear along facet edges. Its use in rings should therefore be limited to protective settings or occasional wear jewelry.
Blue zircon can be found in a range of blue tones from very pale to a saturated medium blue. Due to pleochroism, blue zircon can look slightly greenish when view from one direction.
About the Author
GemSelect is a leading online dealer in fine gemstones, including zircon, spinel, garnet, and tourmaline. Blue Zircon Information
Lost Gems – Main Part 1 Show #60
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3.06 Ct. Pear Shape Natural Blue Zircon Gem Cambodia $22.03 |
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Natural Gem 7pcs 2.36ct Lot 3.5-4mm Round Diamond-Cut White ZIRCON, CAMBODIA $6.00 |
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3.80 Ct. Cushion Natural Blue Zircon Gem Cambodia $16.52 |
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1.84cts FINE DIAMOND CUT NATURAL WHITE ZIRCON ROUND CAMBODIA GEM $7.99 |
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2.07cts LOVELY NATURAL WHITE ZIRCON 6MM RD CAMBODIA GEM $7.99 |
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2.62cts DIAMOND CUT NATURAL WHITE ZIRCON 6MM RD CAMBODIA GEM $9.99 |
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1.93 Ct. Pair Size 6 x 4 Mm. Natural Gems Blue Zircon Oval Cut From Cambodia $0.99 |
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Natural Gem 2.04ct 8×6mm Oval VERY SPARKLING Vibrant Blue ZIRCON, CAMBODIA $0.99 |
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Natural Gem 16pcs 75.86ct Blue Rough ZIRCON in Bottle, CAMBODIA $1.25 |
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1.03 Ct. Clean Oval Natural Blue Zircon Cambodia Gem $0.99 |
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Natural Gem 1.54ct 8×6mm Oval VERY SPARKLING Vibrant Blue ZIRCON, CAMBODIA $0.99 |
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Natural Gem 4pcs 2.37ct Lot 4.5mm Round Diamond-Cut White ZIRCON, CAMBODIA $0.99 |
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Oval Shape 1.16 Ct. Natural Blue Zircon Cambodia Gem $0.99 |
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6.60 Cts STUNNING NATURAL ULTRA RARE PINK ZIRCON CAMBODIA GEM $210.00 |
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Natural Gem 2.08ct 8×6mm Oval GOOD COLOR Vibrant Blue ZIRCON, CAMBODIA $0.99 |
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Natural Gem 2pcs 2.29ct Matching Pair 7×5mm Oval TOP LUSTER Blue ZIRCON CAMBODIA $0.99 |
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Natural Gem 5pcs 2.85ct Lot 4.5-5mm Round Diamond-Cut White ZIRCON, CAMBODIA $0.99 |
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1.20 Ct. Oval Shape Natural Blue Zircon Cambodia Gem $0.99 |
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2.67 Ct. Oval Shape Natural Blue Zircon Cambodia Gems $9.99 |
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2.86 Ct. Oval Shape Natural Blue Zircon Cambodia Gem $0.99 |
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Natural Gem 2pcs 2.12ct Matching Pair 7×5mm Oval STUNNING Blue ZIRCON, CAMBODIA $0.99 |
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Natural Gem 6pcs 2.37ct Lot 4mm Round Diamond-Cut White ZIRCON, CAMBODIA $1.35 |
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Natural Gem 1.77ct 8×6mm Oval LOVELY COLOR Intense Blue ZIRCON, CAMBODIA $0.99 |
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3.03 Ct. Natural Gem Blue Zircon Cushion Shape Cambodia $0.99 |
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1.03 Ct. Oval Shape Natural Gem White Zircon Cambodia $0.99 |
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1.22 Ct. Clean Oval Natural Blue Zircon Cambodia Gem $0.99 |
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4.28 Ct. 5 Pcs. Oval Shape Natural Gems Blue Zircon Cambodia $0.99 |
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Natural Gem 2pcs 2.23ct Matching Pair 7×5mm Oval AAA GRADE Blue ZIRCON, CAMBODIA $0.99 |
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Natural Gem 2.11ct 8×6mm Oval GOOD COLOR Vibrant Blue ZIRCON, CAMBODIA $0.99 |
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Natural Gem 4pcs 2.29ct Lot 4.5mm Round Diamond-Cut White ZIRCON, CAMBODIA $0.99 |
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2.69 Ct. 5 Pcs. Round Natural Blue Zircon Cambodia Gems $9.99 |
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2.31 Ct. Oval Shape Natural Blue Zircon Cambodia Gem $0.99 |
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3.03 Ct. Pear Shape Natural Blue Zircon Cambodia Gem $32.46 |
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Natural Gem 2.28ct 8×6mm Oval GOOD COLOR Vibrant Blue ZIRCON, CAMBODIA $0.99 |
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Natural Gem 2pcs 2.21ct Matching Pair 7×5mm Oval TOP LUSTER Blue ZIRCON CAMBODIA $0.99 |
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Natural Gem 82.21ct 16pcs Blue Rough ZIRCON in Bottle, CAMBODIA $0.99 |
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Natural Gem 5pcs 2.25ct Lot 4-4.5mm Round Diamond-Cut White ZIRCON, CAMBODIA $0.99 |
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1.20 Ct. Oval Natural Blue Zircon Cambodia Gem $0.99 |
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1.49 Ct. Oval Natural Gem Blue Color Zircon Cambodia $0.99 |
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1.55 Ct. Oval Shape Natural Gem White Zircon Cambodia $7.99 |
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1.96 Ct. Oval Shape Natural Blue Zircon Cambodia Gem $4.99 |
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1.28 Ct. Clean Oval Natural Gem Blue Zircon Cambodia $4.99 |
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1.06 Ct. Round Shape Natural Gem Blue Zircon Cambodia $0.99 |
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Matching Pair 1.94 Ct. Natural Blue Zircon Gems Oval Cut From Cambodia $0.99 |
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1.57 Ct. 6.4 Mm Round Natural Blue Zircon Cambodia Gems $7.99 |
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3.99cts- World Best Grade Gem Pc – Rich Natural Sea Foam Blue Zircon – Cambodia $149.99 |
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Natural Gem 7pcs 2.37ct Lot 3.5-4mm Round Diamond-Cut White ZIRCON, CAMBODIA $0.99 |
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Natural Gem 2.01ct 8×6mm Oval GOOD COLOR Vibrant Blue ZIRCON, CAMBODIA $0.99 |
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Natural Gem 2pcs 2.51ct Matching Pair 7×5mm Oval AAA GRADE Blue ZIRCON, CAMBODIA $0.99 |
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2.38 Ct. 5 Pcs. Round Natural Blue Zircon Cambodia Gems $9.99 |
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Dengue Fever Presents: Electric Cambodia $10.58 All products are BRAND NEW and factory sealed. Fast shipping and 100% Satisfaction Guaranteed…. |
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Unpolished Gem: My Mother, My Grandmother, and Me $0.01 After Alice Pung’s family fled to Australia from the killing fields of Cambodia, her father chose Alice as her name because he thought their new country was a Wonderland. In this lyrical, bittersweet debut memoir—already an award- winning bestseller when it was published in Australia—Alice grows up straddling two worlds, East and West, her insular family and the Australia outside. With w… |
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The geology, gemmology, mining methods and economic potential of the Pailin Ruby and Sapphire Gem-field, Khmer Republic (Report) … |
