Zoisite Vs Dravite
Origin
Pakistan, Tanzania
Southern and central Africa
Color
Brown, gray, Green, Blue, rose, Red
White, Colorless, Blue, Red, Green, Yellow, Violet, Black
Streak
White, Colorless
Colorless
Specific Gravity
3.20-3.50
3.03-3.18
Fracture
Uneven, Conchoidal, Even
Uneven, Irregular, Conchoidal
Cleavage
Perfect {010} imperfect {100}
{???} Indistinct
Chemical Composition
Ca2Al3(SiO4)3(OH)
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Pleochroism
X = pale pink to red-violet; Y = nearly colorless to bright pink or deep blue; Z = pale yellow to yellow-green
Very strong: pale yellow colorless
Transparency
Transparent, Translucent, Opaque . May be translucent in thin backlit sections.
Transparent
Refractive Index
1.685-1.707
1.614-1.666
Crystal System
Orthorhombic
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Birefringence
0.006-0.018
0.014-0.032
Clarity
Transparent
Transparent
Cardiovascular
Supports heart health
-
Reproductive
Supports reproductive health
-
Psychology
Transformation
Self-acceptance
Healing
Emotional healing
Emotional healing
Qualities Associated
-
Self-Exploration
Zoisite Vs Dravite Fracture
Fracture is an important parameter when you compare Zoisite and Dravite Physical Properties. It is necessary to understand the significance of these properties, before you compare Zoisite Vs Dravite fracture. Whenever a gemstone chip breaks, it leaves a characteristic line along its breakage. Such lines are known as fracture and are used to identify the gemstones in their initial stages of production when they are in the form of rough minerals. Fracture is usually described with the terms “fibrous” and “splintery” to denote a fracture that usually leaves elongated and sharp edges. Fracture observed in Zoisite is Uneven, Conchoidal and Even. Dravite fracture is Uneven, Irregular and Conchoidal.
Zoisite Vs Dravite Luster
A primary knowledge about Zoisite vs Dravite luster is useful in apparent identifications of these gemstones. Luster is the measure of light that gets reflected when incident on a finished cut gemstone. There are two major types of lusters: Silky and Adamantine. Since luster varies between two crystals of even the same gemstone, luster is limited to basic identification criteria. Zoisite exhibits Vitreous luster. Dravite, on other hand, exhibits Vitreous luster.