Blue topaz gemstones are commonly produced by irradiating and then heating “white” topaz. The treatment is permanent. Virtually all blue topaz on the market today owes its color to this irradiation and heat treatment. Recently, several companies have launched “surface coated” topaz in a wide variety of colors (reds, greenish blues, greens, oranges, etc.), but since these treatments are only on the surface of the stone, they are also subject to scratching. All of our blue topaz gemstones are irradiated and heat-treated.

• Crystal System: Orthorhombic
• Chemical Composition: Fluosilicate of aluminum
• Color: Blue
• Hardness: 8
• Specific Gravity: 3.53 - 3.56
• Refractive Index: 1.610 - 1.620
• Dispersion: 0.014
• Pleochroism: Colorless, pale pink, blue
• Birthstone: December (alternate stone)
• Enhancements: Blue topaz is commonly produced by irradiating and then heating "white" topaz. The treatment is universal and permanent.

	Product Name+	Price	Buy Now
	3.41 ct. Oval Swiss Blue Topaz	$35.00
	9.50 ct. Oval Blue Topaz	$95.00