Australian Facetors' Guild Limited

PHYSICAL AND OPTICAL PROPERTIES

Nanosital is synthesized at a temperature of 1700 "C. The table above presents its main
properties in comparison to wel
l-known materials:

Comparison chart of physical and optical properties

 

PHYSICAL PROPERTIES

NANOSITAL

GLASS

Mohs hardness scale

7

5 - 5.5

Refractive index

1.65-1.7

1.45 - 1.54

Specific gravity

3.5 - 4

2.2 - 2.6

Dispersion (play of colors)

0.015

0.005 - 0.007

Melting point, °C

1700

600 - 700

Treatment problems

Can be readily polished on a dia-

Too soft, difficult

 

mond polishing wheel 3/2

to obtain ideal pol-

 

 

ishing surface

 

 

without matt ap-

 

 

pearance

Heat color stability (in lost-wax casting)

yes

no

Main characteristics of Nanosital

1.    Nanosital's specific gravity index is very close to that of the most valuable
gems
tones such as topaz, sapphire, ruby and aquamarine.

2.     Nanosital and the optical properties of the most popular color gemstones are
almost s
imilar. Nanosital's main feature is its lack of an unnaturally strong lustre,
which is typical of cubic zirconia, wherein the play o
f colors remains attractive.

3.     Nanosital's hardness (7 on Mohs scale) guarantees jewellery durability without the
loss of its original look
. The Nanosital hardness index (7) is higher than glass (5),
but lower than one of the hardest mate
rials - corundum (9).

4.     Its high melting point allows the use of any colored Nanosital in lost-wax casting.

 


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