We have consulted our rubric and revisited our metrics and can confirm that every single pebble and particle is a 15/10.
A large number of particles are confirmed to be in “sample chamber A” inside the collected capsule (~11:10 JST on 12/15). This is thought to be the sample from the first touchdown on Ryugu. The photo looks brown, but our team says “black”! The sample return is a great success!