Lazurite Crystal System

I am trying to determine the geometric shape of this Lazurite. I know Lazurite has a Isometric (Cubic) system, but I am having a hard time seeing this shape in this specimen. The Lazurite crystal looks to be a Tetragonal Trapezohedron (Photo: Tetragonal Trapezohedron). I have attached two pictures of the Lazurite (Photos: Lazurite 1 & Lazurite 2) and would appreciate feedback on the geometric shape.

Hello Richard,
in your lazurite2, if I see correctly, there are two forms:
cube{100} and rhombic dodecahedron {110}.

I send you back your pic (lazurite2) with those forms cube (clear blue) and rhombic dodecahedron (deep blue).

I've a question: in 'my' pic, inside the red rectangle, is that a shadow or a face?
If yes (a face), it could be a {hll} form, like {211}

Cheers,
Pedro Alves



Edited 2 time(s). Last edit at 01/22/2012 10:51PM by Pedro Alves.

Wow, thank you. Yes it is a face. There is also a slightly thicker long thin face on the the opposite side. I will take a few additional photos and post them later tonight.

Hi,
look at the image above.
It looks like your crystal, but the angle (in red) should be smaller...
Dunno, i've to spend more time.

Cheers,
Pedro

I have added three more photos. Let me know if there is a view I am missing. Thanks again for your input.