Optical phenomena
Gemstone phenomena
Explore asterism, chatoyancy, color change, adularescence, play-of-color, and other effects through structure and observation.
Curated discovery
A database filter is not automatically an authority page.
Filters help narrow records. A curated guide explains the science, differences, evidence, and practical decisions behind a topic. Only reviewed guides with a clear purpose are published here.
Published guides
Authority hubs
Every page in this registry has an explicit editorial, evidence, publication, and indexability decision.
No thin pages
This family is architected, but no guide is published until its editorial value and evidence are strong enough.
How this family works
Phenomena need explanation and evidence, not labels alone.
Future phenomenon hubs will reuse the canonical taxonomy and Sprint 7 concept graph, show representative gemstones only when relationships are reviewed, and use documentary media only when its identity and rights are established.