| Gemstone Refractive Index Double Refraction | Aquamarine (beryl) 1.564-1.596 0.004-0.005 | Variscite 1.563-1.594 0.031 | Beryl (precious) 1.562-1.602 0.004-0.010 | Tremolite 1.560-1.643 0.017-0.027 |
|---|
What is the density of Aquamarine?
| Gem Variety Density Chemical Composition | Aquamarine 2.68-2.74 Aluminum beryllium silicate | Emerald 2.67-2.78 Aluminum beryllium silicate | Golden Beryl 2.66-2.87 Aluminum beryllium silicate | Goshenite Beryl 2.66-2.87 Aluminum beryllium silicate |
|---|
What is the specific gravity of Aquamarine?
| Aquamarine | Refractive index 1.577-1.583 (+0.017, – 0.017) | Birefringence 0.005-0.009 | Dispersion Low, 0.014 | Specific gravity 2.72 (+0.18,-0.5) |
|---|
What is Gemstone gravity?
Specific gravity is
a way to express the relative density of a gemstone
. It is measured as the ratio of the density of the gemstone to the density of water. … Specific gravities are expressed in decimal numbers, for example, 4.00 for corundum, 3.52 for diamond , and 2.72 for quartz.
How do you find the specific gravity of a gemstone?
When a gem is weighed in air and then weighed in water the loss of weight is equal to the weight of its volume in water displaced.
The weight of the gem in air divided by the loss of weight in water
gives the specific gravity of the stone or material.
How do you know if aquamarine is real?
The best way to identify a real aquamarine stone is by
looking at its colour
. In its natural form, they have a pale blue colour, which is similar to seawater. They may have a slight green or yellow tint as well. Naturally occurring gems have excellent clarity and transparency.
What is the Colour of aquamarine a precious stone?
The gem's most valuable color is
a dark blue to slightly greenish blue with
moderately strong intensity. In general, the purer and more intense the blue color, the more valuable the stone. Most aquamarine is a light greenish blue.
Why is aquamarine so expensive?
Why does aquamarine cost so much more than blue topaz that's almost the same color? Blue topaz is more common because the color is produced by treating colorless topaz with radiation.
Aquamarine is rarer in nature
, especially in fine color. Its long history as a gem also adds to its collectibility.
Can aquamarine be worn daily?
Aquamarine: Aquamarine, with its icy blue color, displays a magical aura. With hardness similar to that of the topaz, this sea-blue gemstone is
a very good choice for daily wear
. Whether it is an official or a casual event, one can never go wrong with aquamarines.
Is aquamarine a precious stone?
Is Aquamarine A Precious Stone?
Aquamarine is not classified as a precious stone
. In fact, there are only four categories of precious stones: Diamonds.
What is the heaviest gem?
The Cullinan Diamond
is the largest gem-quality rough diamond ever found, weighing 3,106.75 carats (621.35 g) (21.9 ounces), discovered at the Premier No. 2 mine in Cullinan, South Africa, on 26 January 1905. It was named after Thomas Cullinan, the mine's chairman.
What is the most dense gemstone?
| Gem Variety Density Chemical Composition | Sapphire 3.95-4.03 Aluminum oxide | Star Sapphire 3.95-4.03 Aluminum oxide | Zircon 3.93-4.73 Zirconium silicate | Almandine Garnet 3.93-4.30 Iron aluminum silicate |
|---|
What is Sapphire's density?
| GENERAL | Chemical Formula Al 2 O 3 | Density 3.98 g/cc | Hardness 1525 – 2000 Knoop, 9 mhos | Melting Point 2310 K (2040° C) |
|---|
How do you test specific gravity?
The health care provider uses a
dipstick
made with a color-sensitive pad. The color the dipstick changes to will tell the provider the specific gravity of your urine. The dipstick test gives only a rough result. For a more accurate result, your provider may send your urine sample to a lab.
What is the specific gravity of water?
In less dense liquids the hydrometer will float lower, while in more dense liquids it will float higher. Since water is the “standard” by which other liquids are measured, the mark for water is probably labeled as “
1.000
“; hence, the specific gravity of water at about 4°C is 1.000.
What is the specific gravity of turquoise?
note: Specific Gravity of Turquoise =
2.89 gm/cc
.
