Performance SP-200 series Density 2.2 x 103kg/m3 Tensile strength 4.7 x 107Pa(n/m2) Compressive strength >1.1 x 109Pa Coefficient of thermal expansion (20 oC -300 oC) 5.5 x 10-7 cm/cm oC Thermal conductivity (20 oC) 1.4w/m oC Specific heat (20 oC) 660J/kg oC Softening Point 1683 oC Annealing point 1215 oC Remark: Thermal stability- The transparent quartz tube was heated to about 1100 oC … Natural blue diamonds conduct electricity while the irradiated blue ones do not. Fused quartz is a solid material at room temperature, but at high temperatures, it behaves like all glasses. However, measuring specific gravity is difficult and time consuming. Vitreous Silica is the generic term used to describe all types of silica glass, and manufacturers refer to the material as either Fused Quartz or Fused Silica. It is chemically inert in contact with most substances. Physical Properties and Crystal Types: From personal experience you known that solids exhibit a wide range of physical properties. It has a hardness of seven on the Mohs Scale which makes it very durable. β-quartz has higher symmetry, is less dense and has a slightly lower specific gravity. It has electrical properties and heat resistance that make it valuable in electronic products. CORIAN®QUARTZ PERFORMANCE PROPERTIES PHYSICAL PROPERTIES Property Test Typical Result Density ASTM D792 2.4 g/cm3 Nominal Thickness 2 cm and 3 cm Approximate weight per square foot (2 cm) 10 lbs. Approximate weight per square foot (3 cm) 15 lbs. Electrical current is conducted better in some gemstones than others. Effects of Temperature. Its View the typical physical properties of fused quartz Typical properties are average data and should not be used as or to develop product specifications. A simple circuit can be constructed to test this. Quartz: 2.63-2.68: Opal: 1.99-2.25: Amber : 1.05-1.096: As you can see from the chart, few gems share the same SG range. Silicon chips depend upon the directional crystal properties to function. Quartz is one of the most useful natural materials. The conversion, from one solid substance to another solid substance, of quartz to β-quartz is quick, reversible and accompanied with a slight energy absorption. Silica is found almost everywhere in nature, and represents almost 1/3 the mass of the earth’s crust. Some, such as diamond, are very hard; others, such as naphthalene (moth balls) or ice, are soft, by comparison, and are easily crushed. Understanding how electrical resistivity (or conductivity) relates to the actual geologic properties of the earth is important. Quartz watches use these properties. Its usefulness can be linked to its physical and chemical properties. The latter is not the same as normal quartz (or α-quartz), low quartz or just quartz. This makes SG one of the most useful gemstone physical properties you can have for identification. 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