Evanston Store Hours
| Sunday: | CLOSED |
|---|---|
| Monday: | 10:30 am - 5:30 pm |
| Tuesday: | 10:30 am - 5:30 pm |
| Wednesday: | CLOSED |
| Thursday: | 10:30 am - 7:00 pm |
| Friday: | 10:30 am - 5:30 pm |
| Saturday: | 10:00 am - 5:00 pm |
Obsidian is a type of naturally occurring volcanic glass, produced when lava cools rapidly with minimal crystal growth. It has a high silica content, and upon rapid cooling, it results in a natural glass. The brittle quality of Obsidian lends itself to be sharpened, just as shards of glass are extremely sharp. For this reason, Obsidian has been used to make cutting and piercing tools, such as arrowheads and experimentally as surgical blades.
After collecting fossils as a hobby for many years growing up, Dave Douglass opened Dave's Down to Earth Rock Shop in 1970 at the age of 20 (with the help of his parents) at 1312 Chicago Avenue in Evanston, Illinois. The shop contained minerals and fossils, mostly self-collected by the Douglass family.
