Vivianite is pleochroic with X= blue, deep blue or indigo-blue; Y= pale yellowish green, pale bluish green or yellow-green; Z= pale yellowish green or olive-yellow. X is parallel to the b- crystal axis and Z is inclined to the c-crystal axis at an angle of 28.5°.

Mar 17, 2023 · Vivianite is a rare, fragile mineral known for being colorless at first but quickly darkening to deep blues and greens. Learn vivianite’s properties, prices, history, and meanings!

Aug 23, 2022 · Depending on the viewing angle, stones can reveal up to three colors, including yellowish green and olive-green, blue-green, and indigo. When mined, vivianites are colorless or pale green, but their colors darken after exposure to light. As a result, an enthusiast may find an attractive color disappearing over time.

Apr 11, 2024 · Vivianite is an iron phosphate mineral that possesses a distinctive crystal structure, contributing to its notable blue-green color and transparent to translucent appearance.

Vivianite is an extremely rare gem mostly due to its difficulty of faceting. It is very soft, fibrous and somewhat flexible. It is a very attractive mineral specimen with vibrant colors. Vivianite is sometimes found inside fossil clam or snail shells or attached to fossil animal bone.

Vivianite is an extremely rare gem mostly due to its difficulty of faceting. It is very soft, fibrous and somewhat flexible. It is a very attractive mineral specimen with vibrant colors. Vivianite is sometimes found inside fossil clam or snail shells or attached to fossil animal bone.

Its name honors the British mineralogist J. G. Vivian. Colorless when fresh, it turns green blue, dark blue or black by partial oxidation of its iron. The crystals aggregates forming wheels come from Cameroon.

Vivianite is an iron phosphate mineral that has small amounts of manganese, magnesium, and calcium in its structure. Vivianite is colorless but oxidizes quickly, which means its color can change. Specimens of Vivianite can be found in shades of …

Traditionally employed in iconography, vivianite pigments in medieval artifacts have often retained their original hue. However, some instances showcase partial alteration of pigment particles to a yellow tint, resulting in an unintended green appearance.

Vivianite is an iron phosphate mineral that was found in Cornwall, U.K. Named after the late John Henry Vivian, who had discovered it in 1817. Vivianite has been seen in stone and crystal form, and has been noted to be a variety of colors such as blue, green, and sometimes even colorless.