6.9 x 4.8 x 3.3 cm (largest). This excellent, 2-piece set features both of the most desirable colors and varieties of hemimorphite from Wenshan, China. The botryoidal one is very close to the "electric blue" ones that have been the most popular (though hard to get) of them. It is very lustrous - a smithsonite-like luster - and actually slightly translucent. The color in person is even more intense than the photo shows. The second piece is a beautiful, contrasting, powder-blue and is composed of sparkly, sugary, hemimorphite microcrystals.