Mindat Logo
bannerbannerbannerbanner
Welcome!

Lazurite Crystal System

Posted by Richard Felicioni  
avatar Lazurite Crystal System
January 22, 2012 07:19PM
    
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.
Attachments:
open | download - Tetragonal Trapezohedron.png (58.8 KB)
open | download - Lazurite 1.jpg (783.8 KB)
open | download - Lazurite 2.jpg (756.9 KB)
avatar Re: Lazurite Crystal System
January 22, 2012 10:36PM
    
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.
Attachments:
open | download - Lazurite 2 c√≥pia.jpg (293.6 KB)
open | download - lazurite.jpg (55.4 KB)
avatar Re: Lazurite Crystal System
January 22, 2012 11:49PM
    
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.
avatar Re: Lazurite Crystal System
January 23, 2012 12:03AM
    
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
Attachments:
open | download - lazurite.jpg (37.4 KB)
avatar Re: Lazurite Crystal System
January 23, 2012 02:23AM
    
I have added three more photos. Let me know if there is a view I am missing. Thanks again for your input.
Attachments:
open | download - Lazurite 3.jpg (361.6 KB)
open | download - Lazurite 4.jpg (347.9 KB)
open | download - Lazurite 5.jpg (340.9 KB)
Author:

Your Email:


Subject:


Attachments:
  • Valid attachments: jpg, gif, png, pdf
  • No file can be larger than 1000 KB
  • 3 more file(s) can be attached to this message

Spam prevention:
Please, enter the code that you see below in the input field. This is for blocking bots that try to post this form automatically. If the code is hard to read, then just try to guess it right. If you enter the wrong code, a new image is created and you get another chance to enter it right.
CAPTCHA
Message:
Mineral and/or Locality  
Search Google  
Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: October 31, 2014 15:56:20
Mineral and Locality Search
Mineral:
and/or Locality:
Options
Fade toolbar when not in focusFix toolbar to bottom of page
Hide Social Media Links
Slideshow frame delay seconds