The Specimen Library / Record
Opal
Hydrated silica / material varieties
A silica material that may show shifting color—or be beautiful without it.
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01 · The material
Natural History
Opal forms in several geological settings. Precious opal’s organized internal structure produces play-of-color; common opal does not show that effect.
02 · Observe
Under the Loupe
Fire opal describes body color, not necessarily play-of-color. Synthetic material, doublets and triplets are separate identification questions.
03 · Ownership
Collect & Care
Avoid heat, rapid temperature changes and chemical experiments. Do not apply a soaking rule to all opals; assemblies and individual material vary.
04 · The human story
History, Lore & Tradition
Documented history
Gem names can describe body color, optical effect or construction. Read all three parts of an opal label.
Meanings & modern crystal practice
These associations belong to spiritual traditions and personal symbolism, distinct from mineralogical facts.
C&C’s original practice notes associate this material with imagination and introspection. A prompt to let a question remain open long enough to see something new. These are contemporary spiritual associations and editorial reflection suggestions, distinct from mineralogical properties.
Sources & further reading
References are labeled by role. A source documenting a belief is not evidence of a medical or mineralogical effect. Reflection prompts are C&C editorial suggestions.
- GIA: Opal
- GIA: Opal care
- C&C original crystal-practice index, 2017 archive: contemporary C&C teaching and symbolic associations.
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Field resources in development
- Collector Record · future free download
- Quick Reference · future free download
- Coloring & Discovery Page · future low-cost resource
Adjacent drawers
Related Specimens
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