Excellent mixed with crystal
My wife mixes these 4mm fire polished black diamond beads with clear crystal and crystal and green luster fire polished for a chain with subtle color and texture. See picture, which shows a segment of a 100 inch necklace with 6mm olivine subfocals and 12mm cream glass pearl focals. Long 7.5 inch chain run between the 3-bead pearl focals for updated 1920s style.
It's difficult to tell the difference between the Black Diamond beads and the Smokey Topaz. I was planning to use the two together in a bracelet, but have to save them for another project because their color is so similar. I wasn't expecting Black Diamond to have so much brown tint to it.