Blue tourmaline in general is extremely rare and is found in small sizes typically under one carat. Benitoite is a rare blue titanium cyclosilicate barium found in serpentinite altered by hydrothermal conditions. Most hemimorphite is blue to blue green with a color similar to chrysocolla. Sky to swiss blue hemimorphite is most desirable often exhibiting bands of blue with white streaks. These days all gemstones are considered precious since they are all rare and there is a limited supply of them.
All other gemstones are considered as being semi precious stones. It forms at convergent plate boundaries in low temperature high pressure environments typical of the subduction zones. Aquamarine diamond blue indicolite or blue tourmaline sapphire tanzanite topaz blue spinel blue. Sapphire is the ultimate representation of blue gemstones and has consistently remained one of the four precious stones in the world along with diamond ruby and emerald. Assessing color and quality in blue gemstones.
Agate green amazonite aventurine bloodstone emerald jade malachite peridot tourmaline green tsavorites known as garnet green. Second only to diamond in hardness this blue rock is a variety of corundum a mineral that when red is called ruby. Blue gemstones ideal for everyday wear. The violet blue stones that are most commonly known are tanzanite and iolite. Tourmaline indicolite and paraíba aquamarine.
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Pairaba tourmaline has a vivid luminescent blue color while indicolite comes in light to dark shades of blue. Being a cooling stone it has a soft soothing elegance that is used to cure insomnia promote strength and healing and ensure a healthy life. Hemimorphite has a hardness of 5 on the mohs scale and can occur in various tones of blue green and white. Blue gemstones for occasional wear. Paraiba tourmaline and indicolite tourmaline.Blue tourmaline comes in two varieties. The most known blue green forms of. Blue sapphire is the most sought after blue stone but there are other gemstone variants that have an equally rich blue color such as zircon lapis lazuli and kyanite and variants that possess a lighter blue color include gemstones like aquamarine agate and topaz. Blue lace agate as it is known is usually banded in layers of light blue bright blue stripes and threads of brown. There are also much lighter or softer blue stones with the most common of the lighter stones being topaz and aquamarine.
These terms are based on old traditions from the west. The traditional list of gemstones that are considered precious stones are. Benitoite fluoresces under ultraviolet light of short wave which appears bright blue to bluish white in colour. These terms are based on old traditions from the west. Blue tourmaline comes in two varieties.
Benitoite fluoresces under ultraviolet light of short wave which appears bright blue to bluish white in colour. Pairaba tourmaline has a vivid luminescent blue color while indicolite comes in light to dark shades of blue. Agate green amazonite aventurine bloodstone emerald jade malachite peridot tourmaline green tsavorites known as garnet green. All other gemstones are considered as being semi precious stones. Blue tourmaline in general is extremely rare and is found in small sizes typically under one carat.
