Golden Sunstone 8mm Round Faceted A Grade - 15-16 Inch Shape_Cabochon At that time yellowish gems

At that time yellowish gems were called "topaz" in many parts of the world

blue or gray

Many of the earliest gem traders did not realize that these yellowish stones were actually different materials

The image shown has multiple cabochons to give you an idea of the range possibilites of the colors

Clear Quartz

Golden Sunstone 8mm Round Faceted A Grade - 15-16 Inch Shape_Cabochon At that time yellowish gemsSunstone, a variety of Feldspar, is aptly named for its shades of gold, orange, red and brown, as well as its iridescent sparkle. As the stone catches the light, inclusions of Goethite or Hematite refract the light between the layers of the crystal, producing the effect of the stone seeming to shine from within.