Flash Rose Gold:
Spinel is the magnesium aluminum member of the larger spinel group of minerals. Its hardness is 8, its specific gravity is 3.5–4.1, and it is transparent to opaque with a vitreous to dull luster. It may be colorless, but is usually various shades of red, blue, green, yellow, brown, or black.
Flash Rose Gold is similar to rose gold coating; the difference being flash rose gold has a thinner layer of rose gold than the average rose gold plating and making it more cost-effective.