diaspore
diaspore crystal from Turkey
the yellow color of this gem changing color
the pink color of this gem changing color
Detailed sheet
diaspore
Discovered in 1801 in the Urals in Russia, its name comes from the Greek word “diaspora”, meaning “disperse” because when heated with a blowtorch it explodes and disperses into small particles. It is a component of earthy bauxite, but is found in gem quality in Turkey (Anatolia) under the trade name of zultanite. This gem has the rare phenomenon of changing color depending on the nature of light: light green or yellow in the light of day, it turns pink under incandescent lighting. There is also a variety with a shimmer of the “cat’s eye” type.
CHEMICAL CHARACTERISTICS
AlO(OH)
aluminium hydroxide
PHYSICAL CHARACTERISTICS
Main color
colourless
Other colors
brown, grey, yellow, pink, green, purple
due to manganese, it has the color change phenomenon
Color of streak
white
Luster
vitreous
Hardness
6.5 to 7.0
Density
3.30 to 3.50
Cleavage
perfect
Fracture
conchoidal
OPTICAL PROPERTIES
Transparency
transparent
Refractive index
1.690 - 1.750
Double refraction
0.045
definite, biaxial (+)
visible double refraction
Yes
Dispersion
0,020
Pleochroism
definite
Number of colors
3
purplish blue, light green, pink to red
Absorption spectrum
701
yellow diaspore spectrum system
red diaspore spectrum system
Fluorescence
weak
sometimes pale green
CRYSTALS PROPERTIES
thick, tabular
crystals system
orthorhombic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in South Africa, United States (Arizona and Pennsylvania), New Zealand, Brazil, Argentina, Russia, England, China. But the majority of gem quality stones with color changes comes from Turkey.
use in jewelry
The variety known with the gem trade name of zultanite is faceted to highlight the possible changes in its color depending on the nature of light that illuminates it. Stones with such a strong phenomenon of color change are rare.
Daily care
and precautions
Fragile due to its easy cleavage.
Historical
healing properties
As its shades of color, this stone would be one of subtlety, nuances, it would contribute to a serene rest, peaceful, relaxing. This stone will help psychological and intellectual development, promote ambition and would balance the emotions and logical thinking. On the Crown chakra, it would encourage artistic creativity, development of innovative ideas, limitless thinking. On the solar plexus chakra, it would influence also on the mind, helping realistic meditation and opening the mind to novelty. On the root chakra, it would help to anchor roots, recall the material realities without making them a priority, but making them present and unavoidable in any discussion.
Other
Gems
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