Natural Glass var. Obsidian from Department of Caldas, Columbia

Natural Glass var. Obsidian from Department of Caldas, Columbia

Dimension: 9.3cm x 8.8cm x 5.2cm

Weight: 319g

Locality: Department of Caldas, Columbia


This is a lab CERTIFIED Natural Glass var. Obsidian mined in the volcanic district of the Department of Caldas in Columbia.  This beautiful Obsidian has seeming natural conchoidal fracture and vitreous luster, the color is an intense orange.  It is filled with tiny natural air bubble inclusions.  The specimen is completely transparent, very beautiful in person!  Comes with a high quality copper-wired display stand and a certificate of authenticity as pictured. 


I’d been lucky to have acquired one lot of these gorgeous natural glasses back in 2019, it came in different colors and only the best pieces display excellent transparency like this example.  Every single piece has been sent to the mineral testing center of the PR China Land & Resources Ministry to certify for its authenticity so they are guaranteed to be 100% natural.


Obsidian and is formed by rapid cooling of viscous lava from volcanoes.  These amorphous volcanic glasses are usually black to grey-black in colors.  It also occurs as red, brown-green, green, yellow, orange, and rare transparent colorless.  The transparency is commonly opaque but some are found completely transparent.   Air bubbles are sometimes imparted in the course of magma flow.