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 well-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
gemstones such as topaz, sapphire, ruby and aquamarine.

2. Nanosital and the optical properties of the most popular color gemstones are
almost similar. Nanosital's main feature is its lack of an unnaturally strong lustre,
which is typical of cubic zirconia, wherein the play of 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 materials - corundum (9).

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