Under $100

Submissions open 12 / 32 entries Voting starts 11/8/2026 6:20 pm

You can only enter specimens that you spent $100 or less.

Under $100.00

How Rock Battles work: Collectors enter matching specimens from their Geology365 collections while submissions are open. When the bracket starts, logged-in users vote head-to-head each round until one champion remains. Each matchup gets one vote per collector; votes lock in once cast. See full rules for this battle ↓

In the arena

The Bracket

Bracket preview — matchups fill in when voting starts (11/8/2026 6:20 pm) . Slots below show TBD until specimens are seeded.

Round 1

Round 2

Round 3

Championship

Rock Battle rules: Under $100

Under $100 is a single-elimination Geology365 Rock Battle. Logged-in collectors can enter matching specimens from their collection, then vote on matchups until a champion is crowned.

Each logged-in user may enter up to 2 specimens in this battle.
Collectors may withdraw a specimen while submissions are still open.
The bracket is limited to 32 specimens total (currently 12 entered), and needs at least 16 entries to launch.
Eligible specimens must match this battle’s filters: purchase price (Amount Paid) is set and less than $100.00 .
The battle’s active submission window runs from 10/12/2026 12:00 am through 11/8/2026 6:20 pm.
Specimens can be registered while the battle status is open until 11/8/2026 6:20 pm , or until the field fills to 32 entries .
Voting is scheduled to begin 11/8/2026 6:20 pm.
Each voting round lasts 3 days. Matchups advance in a single-elimination bracket until one specimen remains.
Logged-in users may cast one vote per matchup. Votes lock in once cast and cannot be changed. Live standing bars appear after you vote; total vote counts are shown once enough collectors have weighed in.
You must own a specimen to enter it. Anyone with a Geology365 account may vote once voting begins.