Diamond - cubo-octahedral crystal
Miba Mine, Mbuji Mayi
Democratic Republic of Congo (Zaire)
.6 x.6 x .5 CM (thumbnail)
A nice bit of Carbon. Perfectly formed, complete Diamond crystal 2.25 carats showing textbook habit. The color is a green-yellow and the faces shows microscopic stepping and hundreds of small crystal faces. Ex Larry White thumbnail collection, obtained from Stachura Minerals in 1968. The Miba Mine dates back to 1913; it was a Belgian operation for many decades becoming one of the world's largest producers. In the early 60's more than half of the entire worlds supply of Diamonds came from this one site.
A group of three Diamond crystals, each with a slightly different color hue and very different crystal habits. From an old collection, these total 1.55 Carats. The largest crystal is a penetration twin cube the middle size is a cube with half of its faces having hopped indents and half with growth hillocks and the thirst seems like a cyclic discoidal twin. Under magnification many small modifications and extra faces are seen. Sharp and a nice suite of Carbon!
A big, (4.5 CT) complex Diamond crystal with a fine glassy, vitreous luster. An older specimen, vintage 1980's that presents well and shows some very intricate crystal modifications. Also note there is a distinct color shift from yellow to a green or brown green hue in different light sources. A very good crystallized example of the element (Carbon) that humans are made from!