Blue crystal is blue crystal.
Aquamarine is aquamarine.
Crystal is crystal.
It's totally three things.
aquamarine
5. 1.28 kyanite
5. 1.28. 1 English name: kyanite.
5. 1.28.2 mineral name: kyanite.
5. 1.28.3 material characteristics:
Chemical composition: al2sio5 may contain chromium, iron, calcium, magnesium, titanium and other elements.
Crystallization state: crystals.
Crystal system: triclinic crystal system.
Crystal habit: it is often in the form of columnar crystals, and twins are common.
Common colors: light blue to dark blue, green, yellow, gray, brown and colorless.
Gloss: glass luster, fracture can have glass luster to pearl luster.
Cleavage: a group of perfect cleavage and a group of medium cleavage.
Mohs hardness: equal C axis direction: 4 ~ 5; Vertical direction of axis C: 6 ~ 7.
Density: 3.68 (+0.0 1, -0. 12) g/cm3.
Optical characteristics: anisotropic body, biaxial, negative optics.
Polychromaticity: blue kyanite: medium, colorless, dark blue, purple blue.
Refractive index:1.716 ~1.731(0.004).
Birefringence: 0.0 12 ~ 0.0 17.
Ultraviolet fluorescence: long wave: weak, red; Short wave: None.
Absorption spectrum: 435 nm, 445 nm absorption band.
Magnification inspection: solid mineral inclusions, cleavage and color bands.
Special optical effect: cat's eye effect (rare).
5. 1.8 aquamarine
5. 1.8. 1 English name: aquamarine.
5. 1.8.2 Mineral name: beryl.
5. 1.8.3 Material characteristics.
Chemical composition: be3al2si6o18; It may contain elements such as iron.
Crystallization state: crystals.
Crystal system: hexagonal crystal system.
Crystal habit: hexagonal column, with common longitudinal lines on the crystal surface.
Common colors: blue-green to blue-green, light blue, generally lighter in tone.
Gloss: glass luster.
Cleavage: A group of imperfect cleavage.
Mohs hardness: 7.5 ~ 8.
Density: 2.72 (+0. 18, -0.05) g/cm3.
Optical properties: anisotropic body, uniaxial, negative optics.
Polychromaticity: weak to medium, blue and green blue or different shades of blue.
Refractive index:1.577 ~1.583 (0.017).
Birefringence: 0.005 ~ 0.009.
Ultraviolet fluorescence: None.
Light absorption theory: 537nm and 456nm weak absorption lines, 427nm strong absorption lines, still dark and strong colors.
Magnification inspection: liquid inclusions, gas-liquid two-phase inclusions, three-phase inclusions and other tubular inclusions.
Special optical effect: cat's eye effect.
5. 18.4 optimization processing
Heat treatment: blue-green, from iron yellow to green, it can turn blue after heating and remain stable.
5. 1. 16 Timely (crystal, amethyst, topaz, smoky crystal, green crystal, hibiscus stone).
5. 1. 16. 1 English name: quartz (Crystal, Amethyst, Topaz, Smoke Shi Ying, Green Shi Ying, Rose Shi Ying).
5. 1. 16.2 Mineral name: Yingshi (crystal, amethyst, topaz, smoky crystal, green crystal, hibiscus stone).
5. 1. 16.3 material characteristics:
Chemical composition: silica; It may contain titanium, iron, aluminum and other elements.
Crystallization state: crystals.
Crystal system: Tripartite crystal system.
Crystal habit: hexagonal columnar crystal with cylindrical transverse stripes.
Common color: water crystal: colorless and transparent.
Amethyst: light purple to deep purple.
Topaz: light yellow, medium to dark yellow.
Smoke crystal: light to dark brown, brown.
Green crystal: green to yellowish green.
Hibiscus stone: light to medium pink, light tone.
Gloss: glass luster.
Cleavage: No.
Mohs hardness: 7.
Density: 2.66 (+0.03, -0.02) g/cm3.
Optical characteristics: anisotropic body, uniaxial crystal, positive light, "bull's-eye" interferogram, amethyst often has Brazilian law twins.
Polychromaticity: weak, with different shades of color.
Refractive index: 1.544 ~ 1.553.
Birefringence: 0.009.
Ultraviolet fluorescence: long wave: none; Short wave: None.
Absorption spectrum: no characteristic.
Magnification inspection: banded, liquid and gas-liquid two-phase inclusions, gas-liquid-solid three-phase inclusions, acicular rutile, tourmaline and other solids.
Mineral inclusions, negative crystals.
Special optical effect: starlight effect (six beats, common in light pink); Cat's eye effect.
5. 1. 16.4 optimization processing
Heat treatment: a) Very dark amethyst can be lightly heated.
B) The hue of smoke color can be removed.
C) Amethyst is transformed into topaz and green crystal by heating.
D) Some smoke crystals are transformed into yellow crystals with green tones by heating. Heat-treated gemstones with similar seasons are stable in color and difficult to be found.
Irradiation treatment: a) the crystal is transformed into smoke crystal after irradiation, which is not easy to determine.
B) The color of hibiscus stone can be deepened after irradiation, and the color is stable and difficult to determine.
Dyeing treatment: the crack is quenched and cracked, and pink or other dyes are immersed in the crack, which can be identified by magnifying inspection and ultraviolet fluorescence.
Besides, the crystal is not blue!