Wednesday 23 June 2010 A perfect octahedron Left you see a perfect octahedron and next to it, a polished triangle in the same color A perfect octahedron is a must have for every rough diamond collector! Share this post Share on Facebook Opens in a new window. Tweet on Twitter Opens in a new window. Pin on Pinterest Opens in a new window. Share on LinkedIn Opens in a new window. Share on WhatsApp Opens in a new window. Back to blog