Kyanite is one of the most attractive blue minerals in nature.

Birefringence: 0.012 to 0.033 . 37, 5271-5283 (1998) [Calculation script (Python)] Data [CSV - comma separated] [TXT - tab separated] [Full database record ] Optical transmission calculator. Kyanite is a polymorph of andalusite and sillimanite.

Optical Character: Biaxial/+,-Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references. Kyanite Optical Properties Transparency Transparent - Translucent Dispersion Strength: Moderate Fire Value: 0.020 Refractive Index 1.716-1.731 Tolerance:(+0.004/-0.004) Birefringence 0.012-0.017 Optic Character Biaxial Optic Sign

Physical Properties of Andalusite In optical mineralogy, a polymorph exists when two or more minerals share the same chemistry but they have different structures. Also ¯brous, compact, massive. Kyanite PPL properties. Twinning: On f101g, rare. Survey map (132) Occurrences (497) Photos and Images (123) Images (table view) Image reel Gallery Mineral images by locality Pictures (118 Images total) Views (Image: 1323088001): 12052, Rating: 8.5: Kyanit xx auf Paragonit xx: Alpe Sponda Pizzo Forno Leventina Tessin Schweiz. Mineral Kyanite is actually a polymorph of other interesting minerals called sillimanite and andalusite.

Color: Colorless to pale blue; violet blue (thick section), cobalt blue (thick section) Pleochroism: None to weak (violet-blue, deep cobalt blue). Optical constants of METALS Copper (Cu) Wavelength: µm (2.0664e-01 – 1.2398e+01) Complex refractive index (n+ik) = = n ... Optical properties of metallic films for vertical-cavity optoelectronic devices, Appl. Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references. The vertical hardness of Kyanite ranges from 4.5 to 5.5, and horizontal hardness from 6 to 7. *Sometimes also if it’s white and bladed, or grey and bladed.

Opt. Optical Properties of Kyanite; Refractive Index: 1.710 to 1.735. Sillimanite is a polymorph of andalusite and kyanite. Relief: High positive Habit/Form: Kyanite commonly forms elongate bladed or columnar crystals that may appear to be bent. Kyanite Al2SiO5 °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Triclinic. Point Group: 1: Crystals bladed and tabular on f100g, elongated k to [001], to 0.5 m; typically bent or twisted. These three minerals share the same formula, but are stable at different P/T conditions.

Radioactivity:

These three minerals share the same formula, but are stable at different P/T conditions.

General Sillimanite Information : Chemical Formula: Al2SiO5 = Al[6]Al[4]OSiO4 : Composition: Molecular Weight = 162.05 gm Aluminum 33.30 % Al 62.92 % Al 2 O 3: Silicon 17.33 % Si 37.08 % SiO 2: Oxygen 49.37 % O: 100.00 % 100.00 % = TOTAL OXIDE Calculated Properties of Kyanite : Electron Density: Bulk Density (Electron Density)=3.57 gm/cc note: Specific Gravity of Kyanite =3.62 gm/cc.

Kyanite is typically a blue aluminosilicate mineral, usually found in aluminium-rich metamorphic pegmatites and/or sedimentary rock.Kyanite in metamorphic rocks generally indicates pressures higher than four kilobars.It is commonly found in quartz. Andalusite is a rock forming minerals and is an aluminium nesosilicate minerals with the chemical formula Al2SiO5.At higher temperatures and pressures, andalusite may convert to sillimanite.andalusite is an aluminosilicate index mineral, providing clues to depth and pressures involved in producing the host rock. Andalusite Al2SiO5 °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Orthorhombic.

Mineral Kyanite is commonly used in the manufacture of spark plugs.

Point Group: 2=m 2=m 2=m: As euhedral crystals or columnar aggregates having nearly square cross sections, commonly elongated k [001], to 20 cm. It sometimes exhibits intense shades of blue, or even multiple shades with color zoning in a single crystal. Green Kyanite can facilitate astral travel, lucid dreaming, and other forms of dream work.

Kyanite Optical Properties Transparency Transparent - Translucent Dispersion Strength: Moderate Fire Value: 0.020 Refractive Index 1.716-1.731 Tolerance:(+0.004/-0.004) Birefringence 0.012-0.017 Optic Character Biaxial Optic Sign The color of Kyanite, combined with its well-formed and sometimes large crystals, make this mineral appreciated by both novice and expert collectors alike. Meditating with Green Kyanite can help transfer the higher-frequency vibrations from higher realms, gained from the Third-Eye Chakra into the Heart Chakra, where it can be assimilated into one's conscious wisdom for application in the physical realm.