OCA:Gems
Gems  


Rulestring  4568/3457 B3457/S4568 


Rule integer  188600  
Character  Explosive  
Black/white reversal  B15678/S02678 
Gems is a Lifelike cellular automaton in which dead cells are born if they have precisely three, four, five or seven live neighbors, and in which live cells will survive if they have precisely four, five, six or eight live neighbors. Small random initial configurations in Gems tend to turn into highperiod oscillators (the "gems" the rule is named after); larger random initial configurations explode slowly.
Patterns
No still lifes exist in Gems, and no odd period oscillators have been found in Gems.
Spaceships
Gems has a single known spaceship moving orthogonally at a speed of c/5648, David Eppstein's glider 13047. This is the slowest known elementary spaceship in any twostate outertotalistic rule. It was also the slowest known across all twostate isotropic rules until it was surpassed by a c/5953 spaceship in the rule B2an3acqry4cnw5cj6cei78/S1c2n3nqy4acknqtw5ijkr6ei78, found by Arie Paap in July 2019.^{[1]}
Glider 13047 (Catagolue: here) (click above to open LifeViewer) RLE: here Plaintext: here 
References
 ↑ Arie Paap. Re: Smallest Spaceships Supporting Specific Speeds (5s) Project (discussion thread) at the ConwayLife.com forums
External links
 Gems: Long Live the Oscillators, and the Slowest Glider
 Gems at Adam P. Goucher's Catagolue
 Gems at David Eppstein's Glider Database