Upcoming Events
THANKSGIVING SHOWCASE
Friday, November 15 – Sunday, November 17
TUCSON GEM AND FINE MINERAL SHOW 2025
January 31 – February 15
10am – 6pm
Jan 31 – Feb 15, 2025
The Mineral City Show is located just west of N Oracle Road,
between W Lester and W Plata streets,
Tucson, Arizona 85705, USA
Get the latest news from Collector’s Edge!
Here we cover recent collections we’ve acquired, specimen mining project updates, show reports, and educational articles we’ve written on mineral collecting and mineral localities.
You can read more about some of our specimen mining projects by clicking on the blog posts below.
Announcing the permanent closure of the Detroit City Portal of the Sweet Home Mine
September 3, 2024
After 7 years of mining operations, the Detroit City Portal of the Sweet Home Mine has been permanently closed.
It has been a long journey for us on Mount Bross.
What in the world is going on up at the mine?
I’ll tell you, but I have to go back a bit. The last detailed update posted on the website was in May of 2020. There had been some personnel changes, the weather was rough, there was still tons of rock to move, though hopes were high after the last two...
Concerning Cataloging
Keeping track of your collection is important for so many different reasons like insurance purposes, remembering species, locations, and stories, and just knowing what you have. It also helps when you’re shopping and you’re not sure if you want to upgrade...
How to Start A Mineral Collection
Most collectors begin with one special piece - either given to them, or something they came across at a shop or mineral show. Collectors can start when they're young, or at any age.There are so many different minerals and gems, in so many configurations, that anyone...