That’s because obsidian is pretty unstable as far as rocks go; over time, the silica molecules within it end up rearranging into a more organized fashion, a process known as devitrification.

Obsidian nodules and flakes have a smooth, glassy texture and sharp edges. At a microscopic level, obsidian flakes can be sharper than instruments made of surgical steel.

In this Sept. 8, 2016 photo, Obsidian Trail cuts through lava rock on the way to Obsidian Falls near Sisters, Ore. The Obsidian Trailhead provides access to the Pacific Crest Trail and to loop ...

I walked a mile of the PCT along some of the most incredible high-country scenery I have ever encountered. The trail led through shiny obsidian rock and skirted the creek and several small ponds.

A piece of obsidian rock sits on display in the Smithsonian Institution in Washington, D.C. William Healey Dall collected the rock in the 1860s near the Nowitna River in Interior Alaska.

Obsidian Theatre in association with Standing Room Only Productions is proud to bring the cult classic rock musical, HEDWIG AND THE ANGRY INCH, to Houston audiences June 7 - July 1. Obsidian/SRO ...

The fund, managed by Stuart Spodek, has roughly $1.7 billion in assets, and beat the average hedge fund, which returned more than 8% in 2019. Obsidian recovered from an August when it lost 3% in ...

Here's How 'Game Of Thrones' Dragonglass Compares To Obsidian Rock. By Niño Cabatingan Published 04/16/19 AT 8:18 AM EDT.

BlackRock Inc's $1.9 billion Obsidian hedge fund posted a negative 7.5 percent year-to-date return through March 4, HSBC data showed. The fund was down 4 percent in January, according to an ...

BlackRock Inc's $1.9 billion Obsidian hedge fund recorded losses in January, suffering its worst start to the year in its nearly 20-year history, but the fund was narrowing those losses so far in ...