Now that I realize, to design something with a rock is not precisely simple because rocks and stones have different irregular shapes that don’t look good in logos or brands because people prefer asymmetric shapes.
This is one idea I came up with, using zen stones which represent balance. They are still stones or rocks as “rock solid” and one on top of the other would represent stability from the core to the top.
This is just playing around for one hour. If someone has a better idea, I’m welcome to suggestions. Note that this not pixel perfect, it’s readable at smaller size on my tests but it would need some adjustments and tuning and fonts probably replaced with some open source alternative.