Ironstone host / matrix
Generic host/matrix relationship only. The shape is not traced from a real specimen.
Claims · BOU007-CLM-001 · Sources · BOU-SRC-001 · BOU-SRC-007 · BOU-SRC-011
BOU007 · diagrammatic teaching model
Interactive Specimen Lab
Toggle general boulder-opal anatomy concepts in an original teaching diagram, then inspect documented specimen metadata beside it. The diagram is never a photograph, a segmentation result or a substitute for a gemological examination.
Teaching model, not specimen analysis
Explore anatomy without pretending to identify a stone.
Every layer below is a conceptual or general geological teaching category. No uploaded image, real specimen photograph or source image is analyzed by this page.
Original programmatic diagram · not to scale · not specimen media · no image analysis
The outlined abstract form provides a teaching canvas. Visible layers are generic categories only; they do not mark features in a real specimen.
No-JavaScript anatomy guide
Every layer remains explained as text.
The interactive controls are optional. These four evidence cards provide the complete learning path even when JavaScript is unavailable.
Precious / play-of-colour opal
Conceptual opal seam. It does not identify precious opal in an uploaded or photographed object.
Claims · BOU007-CLM-002 · Sources · BOU-SRC-011 · BOU006-SRC-001
Common opal / potch
Conceptual teaching band only. It is not a specimen observation.
Claims · BOU007-CLM-003 · Sources · BOU-SRC-011 · BOU-SRC-001
Structural boundaries / fractures
Diagrammatic crack/boundary cues only; no real fracture network is segmented or predicted.
Claims · BOU007-CLM-004 · Sources · BOU-SRC-001 · BOU-SRC-007
Documented record context
Bring evidence beside the model, never into it.
Selecting a record displays only metadata already documented in BOU006. It does not change the teaching diagram into that specimen or infer missing facts.
- GIA 1993 cover · large Queensland boulder opal · external_reference_only_not_reproduced
- GIA 1993 cover · small Queensland boulder opal · external_reference_only_not_reproduced
- GIA field report · giant Yowah boulder-opal rough · external_reference_only_not_reproduced
- GIA field report · Quilpie opal-bearing ironstone concretion · external_reference_only_not_reproduced
Select a documented record to inspect its metadata beside the teaching model. The diagram will not change into that specimen.
Without JavaScript, the four record links remain directly available.
Evidence bridges
Continue through the source graph.
Use Formation for broad geological mechanisms, Atlas/Fields for locality evidence, and the Specimen Cabinet for source-identified records. None of those relationships make this diagram specimen-specific.
Question triage
Ask what the teaching model can actually answer.
The anatomy layers are conceptual. Pair them with documentation or expert testing only when the question exceeds description.
Description is appropriate
Visible properties can be described without certifying identity.
Educational output only. This interaction does not issue an authenticity, treatment, origin or value certificate.
ICU / CONNECTED DISCOVERY
Continue through related ideas.
These are bounded editorial connections; paid placement does not influence them.
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