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Boundary
A paper block is not a real grain or identified mineral.
Complete source
Fictional postcard has a rock outline filled with big pale/dark paper blocks. Historical U02 E3 describes minerals as rock components; no component names are given here.
Id
C04
Invitation
Write or direct a components caption and a question about the unnamed blocks.
Next try
Compare a second differently coloured model while keeping both identities open.
Ordinary possible response
The paper blocks model components; this picture cannot name their minerals.
Title
Rock components postcard
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Exact source: 089d6ac9ec4293ea4b949980b0e79e5cbf08fc82 · 2026-10-13. Source edition, roles and hashes
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