Blue Iolite Gemstone
Andalusite Gemstones
Many gemstones varieties look alike, especially to the untrained observer. Given a collection of light blue colored stones — such as topaz, aquamarine, zircon, iolite, apatite and fluorite — even many people in the gem trade would have a hard time identifying each variety without the use of some gemological tools.
But there are some gemstones that have such a unique look that it’s hard to confuse them with any other gems. Andalusite is a good example. Andalusite has such a distinctive combination of colors, and such pronounced pleochroism, that only unusually colored tourmaline could ever be mistaken for andalusite.
Pleochroic gems appear to have different colors or depth of color when viewed from different angles. The effect is caused by differing absorption of light rays in doubly refractive crystals. Among the gems that are strongly pleochroic are andalusite, iolite, kyanite, kunzite, sphene and unheated tanzanite. Some pleochroic gems are said to be dichoric — displaying two different colors; kunzite is an example. Others are said to be trichroic, such as andalusite.
Andalusite displays shades of yellow, olive and reddish brown depending on the orientation of the crystal. The pleochroic effect can be enhanced by specific orientation and cut. Those cuts with a long axis such as an oval, pear, marquis or emerald cut tend to show one color near the center and a second, usually darker color near the ends. Square and round cuts usually blend the colors into a mosaic.
Andalusite is usually classified as one of the lesser-known gemstones. Transparent material of gemstone quality is rare, so you are unlikely to find andalusite in your local jewelry store. It has mostly been a collector’s stone but some jewelry designers have begun to incorporate it in their designs.
Andalusite is named after the Spanish province of Andalusia where it was first discovered. Andalusite deposits are also found in Australia, Brazil, Canada, Russia, Sri Lanka and the USA.
About the Author
GemSelect is a leading online dealer in fine gemstones, specializing in sapphire, spinel, garnet, tourmaline and zircon. Fine Andalusite Gemstones
piro pendant, sterling, 18k gold, blue topaz, iolite, cut glass.mpg
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ROUGH AWESOME GEMSTONE BLUE VIOLET NATURAL IOLITE 14.65CT $0.99 |
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6mm ROUND-FACET DEEP PURPLE/BLUE NATURAL AFRICAN IOLITE GEMSTONE £1 NR! $1.56 |
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UNUSUAL 5mm ROUND-FACET PURPLE/BLUE NATURAL AFRICAN IOLITE GEMSTONE £1 NR! $1.56 |
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SIGNED CA STERLING SILVER BLUE IOLITE MARCASITE RING SIZE 6 VINTAGE GEMSTONE $20.00 |
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UNUSUAL 6mm TRILLIANT-FACET PURPLE/BLUE NATURAL AFRICAN IOLITE GEMSTONE £1 NR! $1.56 |
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¾ CT. NATURAL VILOLET BLUE IOLITE TOP GEMSTONE JEWEL CORDIERITE BI PLEOCHROISM $22.00 |
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⅔ CT. NATURAL VILOLET BLUE IOLITE TOP GEMSTONE JEWEL CORDIERITE BI PLEOCHROISM $22.00 |
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2.52Cts – Extreme Fire Hot Rich Luster Natural Purple Blue Iolite Gemstone $24.99 |
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Blue Iolite Gemstone Handmade 18K Gold Ladies Filigree Ajoure Ring size 8.75 $460.00 |
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5.89cts Natural Blue Iolite Loose Gemstone $65.00 |
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4.55CT NATURAL IOLITE VIOLET BLUE OVAL FACETED GEMSTONE $9.90 |
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3.1CT NATURAL IOLITE VIOLET BLUE OVAL FACETED GEMSTONE $9.90 |
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3.1CT NATURAL IOLITE VIOLET BLUE FACETED GEMSTONE $9.90 |
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3.55CT NATURAL IOLITE VIOLET BLUE EMERALD CUT FACETED GEMSTONE $9.90 |
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Dazzling Natural 6.40 Ct Oval Shape Blue Iolite Loose Gemstone* Certified $18.36 |
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GORGEOUS! 2.25 CT. VIOLET BLUE IOLITE PEAR SHAPE NATURAL GEMSTONE UNHEATED $3.99 |
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Blue Violet Iolite Gemstone Handmade Sterling Silver Ladies Pinwheel Ring size 7 $86.00 |
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Blue Iolite and Sapphire Gemstones Handmade Sterling Silver Ladies Ring size 8 $125.00 |
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2.52 Cts GLITTERING BEST GRADE PURPLE BLUE NATURAL IOLITE GEMSTONE $30.00 |
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PAIR BEAUTIFUL! 2.14 CT. VIOLET BLUE IOLITE PEAR SHAPE NATURAL GEMSTONE UNHEATED $3.99 |
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BRILLIANT! 2.56 CT. VIOLET BLUE IOLITE OVAL CUT NATURAL GEMSTONE UNHEATED $9.99 |
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17.64cts NATURAL BLUE IOLITE LOOSE GEMSTONE $22.50 |
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1.47ct STUNNING RARE EARTH MINED TOP NATURAL AAA+ BLUE IOLITE QUALITY GEMSTONE! $15.00 |
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Blue Peridot Iolite Gemstone 925 Sterling Silver Solitaire Ring Size 6 Lot#10R $44.50 |
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9PCS ROUGH GEMSTONE BLUE VIOLET NATURAL IOLITE 74.40CT $0.99 |
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4cts Natural Sapphire Blue Iolite Loose Gemstone $53.99 |
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1.88cts Natural Blue Iolite Loose Gemstone $18.00 |
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Fabulous Natural 1.96Cts Cornflower Blue Iolite Loose Gemstone $10.80 |
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Gray Blue Violet Iolite Untreated Gemstone Sterling Silver Ladies Ring size 7.25 $65.00 |
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Regal Blue~~Handmade Sterling Silver & Iolite Gemstone Bracelet~~Novica India $49.95 |
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2.54cts Splendid Natural Blue Iolite Loose Gemstone $49.50 |
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925 silver long cut blue iolite gemstone earrings. $26.86 |
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.32 Carats Blue Iolite Faceted Gemstone Pear ILT466 $1.99 |
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.35 Carats Blue Iolite Faceted Gemstone Oval ILT03 $5.99 |
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.35 Carats Blue Iolite Faceted Gemstone Oval ILT472 $1.99 |
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.35 Carats Blue Iolite Faceted Gemstone Pear ILT06 $5.99 |
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.36 Carats Blue Iolite Faceted Gemstone Round ILT455 $1.99 |
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.375 Carats Blue Iolite Faceted Gemstone Round ILT456 $1.99 |
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.51 Carats Blue Iolite Faceted Gemstone Pear ILT460 $1.99 |
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.185 Carats Blue Iolite Faceted Gemstone Octagon ILT05 $1.99 |
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.19 Carats Blue Iolite Faceted Gemstone Round ILT07 $1.99 |
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.195 Carats Blue Iolite Faceted Gemstone Round ILT459 $0.99 |
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.20 Carats Blue Iolite Faceted Gemstone Round ILT01 $1.99 |
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.265 Carats Blue Iolite Faceted Gemstone Pear ILT04 $5.99 |
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.29 Carats Blue Iolite Faceted Gemstone Pear ILT448 $1.99 |
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.30 Carats Blue Iolite Faceted Gemstone Pear ILT02 $3.99 |
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.31 Carats Blue Iolite Faceted Gemstone Pear ILT462 $1.99 |
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Natural Blue-Purple Iolite Loose Gemstone 8×6mm Oval *FREE SHIPPING* $25.56 |
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UNUSUAL 9×7mm OVAL-FACET DEEP PURPLE-BLUE NATURAL AFRICAN IOLITE GEMSTONE £1 NR! $1.56 |
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Aquamarine Iolite Blue Topaz Gemstone Silver Plated Ring Jewelry Sz 8 Gs#3R New $18.99 |
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Silvertone Blue Iolite Snowflake Pendant (India) $19.99 This stylish pendant features blue iolite gemstones in a unique snowflake design. This unique pendant is handcrafted by artisans in India. |
