Rubellite Vs Dravite
Origin
Afghanistan, Brazil, Madagascar, Mozambique, Southern and central Africa, Russia, Sri Lanka
Southern and central Africa
Color
White, Colorless, Blue, Red, Green, Yellow, Violet
White, Colorless, Blue, Red, Green, Yellow, Violet, Black
Specific Gravity
3.01-3.06
3.03-3.18
Fracture
Conchoidal
Uneven, Irregular, Conchoidal
Cleavage
Indiscernible
{???} Indistinct
Mohs Hardness
7-7.5
7-7.5
Chemical Composition
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Pleochroism
Strong: dark red pinkish-redHerve Nicolas Lazzarelli
Very strong: pale yellow colorless
Transparency
Transparent, Translucent
Transparent
Refractive Index
1.614-1.666
1.614-1.666
Crystal System
-
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Birefringence
0.014-0.040
0.014-0.032
Clarity
Transparent
Transparent
Psychology
Passion
Self-acceptance
Healing
Emotional healing
Emotional healing
Qualities Associated
Passion
Self-Exploration
Rubellite Vs Dravite Fracture
Fracture is an important parameter when you compare Rubellite and Dravite Physical Properties. It is necessary to understand the significance of these properties, before you compare Rubellite 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 Rubellite is Conchoidal. Dravite fracture is Uneven, Irregular and Conchoidal.
Rubellite Vs Dravite Luster
A primary knowledge about Rubellite 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. Dravite, on other hand, exhibits Vitreous luster.