A variety of quartz, Brazilian smoky quartz has a tinted appearance. Colors of this stone vary, ranging from a smoky gray to brown to black. As with many gemstones the saturation of color increases with the size of the stone. Ranking 7 on the Mohs scale of hardness, the gem is typically eye-clean, without visible flaws. Look your stylish best all day with this ring. Decked with a lustrous oval of Brazilian smoky quartz, the piece is detailed with miligrain work. Fashioned in sterling silver. Natural properties of mined gemstones offer a slight difference in color saturation, hue, and tone. Gemstone images may not always capture these slight differences.