Origin
Southern and central Africa
Burma, Sri Lanka, India, Madagascar, Kenya, Tanzania, Thailand, Cambodia, China, Australia, USA
Color
Blue, Colorless, White
Colorless, Yellow, Green, Violet, White, Colorless, Blue, Red, Green, Yellow, pink
Streak
White
Not Available
For which Rashi?
Gemini, Virgo, Gemini, Virgo, Gemini, Virgo
Pisces, Taurus, Gemini, Libra, Pisces, Taurus, Gemini, Libra, Pisces, Taurus, Gemini, Libra
Element of Planets
Earth
Water
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Energy
Not Available
Receptive
Not to wear with
Not Available
Not Available
Powers
Not Available
Psychic Power, Prosperity
Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Tenacity
Not Available
Not Available
Solubility
Not Available
insoluble
Durability
Not Available
Not Available
Specific Gravity
2.45-2.58
3.95-4.03
Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Uneven, Uneven, Gems, Sixth Edition (2006)
Cleavage
None
None, but may exhibit parting
Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 2 O 3
Luster
Vitreous
Vitreous, Adamantine, Vitreous, Adamantine
Pleochroism
NilArthur Thomas
Strong
Transparency
Gemmological Tables (2004) More from other references
Transparent, Translucent, Transparent to opaque
Refractive Index
1.583-1.608
1.762-1.788
Optic Character
Not Available
Not Available
Crystal System
monoclinic
Trigonal
Birefringence
0.019
0.008-0.009
Clarity
Gemmological Tables (2004) More from other references
Transparent
Neurological
Not Available
Not Available
Cardiovascular
Not Available
Not Available
Respiratory
Not Available
Not Available
Reproductive
Not Available
Not Available
Digestive
Not Available
Not Available
Psychology
Not Available
Not Available
Healing
Not Available
Not Available
Qualities Associated
Not Available
Not Available
Howlite Vs Sapphire Fracture
Fracture is an important parameter when you compare Howlite and Sapphire Physical Properties. It is necessary to understand the significance of these properties, before you compare Howlite Vs Sapphire 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 Howlite is Brittle, Conchoidal, Gemstones (2009), Gemstones (2009), UnevenArthur Thomas and UnevenArthur Thomas. Sapphire fracture is Gems, Sixth Edition (2006), Uneven and Uneven.
Howlite Vs Sapphire Luster
A primary knowledge about Howlite vs Sapphire 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. Howlite exhibits Vitreous luster. Sapphire, on other hand, exhibits Adamantine, Adamantine, Vitreous and Vitreous luster.