beryl
Enable an agent to recognise beryl, assess the condition and evidential quality of a specimen or lot, and judge its suitability for identification, gem use, collection or material processing.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise beryl, assess the condition and evidential quality of a specimen or lot, and judge its suitability for identification, gem use, collection or material processing.
Beryl is a hexagonal cyclosilicate mineral with ideal composition Be3Al2Si6O18, distinguished by rings of six silicate tetrahedra and encompassing several gemstone varieties.
It can be Select minimally damaging tests to confirm or challenge beryl identification.; Assign or withhold a variety, natural-origin or treatment attribution according to available evidence.; Assess whether fractures, inclusions and prior treatments permit a proposed cutting, mounting or cleaning operation.; Evaluate a representative lot for potential beryllium-bearing feedstock use using measured composition and impurities.; Select handling and processing controls appropriate to an intact specimen, powder or dust-generating operation.; Record unresolved identification or provenance claims and refer them for targeted laboratory examination..
Distinguishing features
Confirm the beryl mineral species through composition and structural evidence consistent with Be3Al2Si6O18; colour or a hexagonal-looking outline alone is insufficient.
Distinguish beryl from visually similar quartz, topaz, glass and other gem materials using a combination of optical, physical and, where necessary, laboratory tests.
Treat emerald, aquamarine and other beryl variety names as classifications within beryl, with supporting naming criteria, rather than as separate mineral identities.
Distinguish a beryl crystal or beryl-rich concentrate from a host rock or mixed lot that merely contains beryl.
Separate species identity from origin: synthetic beryl may satisfy mineral identification tests while requiring additional evidence to distinguish it from natural material.
Scope
+ Mineral identity, composition and crystal structure
+ Natural or synthetic origin and evidence supporting that attribution
+ Named varieties, colour, transparency and treatment status
+ Specimen or lot condition, inclusions, fractures and alteration
+ Evidence supporting gem, collection or beryllium-bearing feedstock suitability
+ Handling and processing constraints associated with the material's physical form
- Complete geology and economic evaluation of a beryl-bearing deposit
- Finished jewellery design, ownership and retail pricing
- Beryllium metal and other beryllium compounds produced from beryl
- Detailed mining, synthesis, cutting or extraction process models
- Medical diagnosis or treatment following occupational exposure
Characteristics
- Mineral identity
- confirmed beryl | probable beryl | unresolved | other material Controls whether beryl-specific interpretations and actions are justified.
- Composition and substitutions
- Ideal formula Be3Al2Si6O18; measured constituents in mass percent, ppm or atoms per formula unit, with method and uncertainty Supports identification and interpretation of colour, compositional variation and processing suitability.
- Variety attribution
- emerald | aquamarine | morganite | heliodor or golden beryl | goshenite | red beryl | other | unassigned; record naming authority Connects appearance to a supported variety name while preserving uncertainty at naming boundaries.
- Formation origin
- natural | synthetic | unresolved; synthesis method if established Origin affects interpretation, disclosure and specimen significance without changing species identity.
- Optical properties
- Refractive indices and birefringence, dimensionless; absorption features in nm or cm^-1; method and conditions Provides evidence for identification and investigation of colour or treatment.
- Colour and transparency
- Colour description under stated illumination; transparent | translucent | opaque; orientation where relevant Supports variety assessment and use selection while making observations reproducible.
- Physical form and condition
- crystal | cut stone | fragment | powder | concentrate | in matrix; dimensions in mm, mass in g or ct; mapped fractures and alteration Determines feasible tests, breakage risks and handling or processing requirements.
- Treatment status
- untested | no indications detected | treatment detected | treatment reported | inconclusive; identify treatment and evidence Treatment can affect appearance, care, stability and disclosure.
- Beryl content of a lot
- Mass percent beryl and separately measured beryllium content, with sampling basis and analytical method Prevents a species formula or an attractive specimen from being mistaken for a representative feedstock assay.
- Identification and provenance evidence
- Links to specimens, sampling records, laboratory reports, locality records and custody history Makes identity and origin claims traceable to the material actually examined.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.beryl
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 9 layers · 17 findings · 27 questions.
Beryl species and material boundary Establish whether the subject is beryl and whether the assessment concerns a crystal, composite specimen or mixed lot.
A colour name, crystal outline or beryllium assay cannot independently establish both mineral identity and the extent of the material being modelled.
Species confirmation
Connect the proposed beryl identity to chemical and structural evidence.
Composition and structure agreement
Record whether analytical evidence supports the beryl species, including departures from ideal composition and competing identifications.
- Which observations or analyses support beryl rather than quartz, topaz, glass or another visually similar material? definition
- Do measured composition and structural results agree with the proposed identity, and what limits affect those measurements? measurement
Specimen and lot boundary
Separate the beryl component from matrix, associated minerals and other constituents.
Beryl component extent
Identify the material to which each observation applies and avoid extending a local identification to an untested whole.
- Is the subject a single beryl crystal, a cut stone, beryl in matrix or a mixed concentrate, and which components are included? boundary
- How was the examined portion selected, and does it represent the specimen or lot for which an assessment is requested? provenance
Variety, origin and treatment Keep variety naming, formation origin and modification history as separately supported assessments.
Beryl's named varieties and natural or synthetic forms require distinctions that species identification alone cannot provide.
Colour and variety
Connect observed colour to variety terminology without treating appearance as proof of its cause.
Supported variety name
Record a proposed variety name alongside colour observations, relevant analyses and the naming convention used.
- What colour and transparency are observed under stated illumination and viewing orientation? measurement
- Which criteria support the proposed variety name, especially at the boundary between emerald and green beryl? boundary
Formation and modification evidence
Assess natural or synthetic formation separately from subsequent treatment.
Origin and treatment attribution
Tie origin and treatment statements to examination results, distinguishing reported history from detected evidence.
- Which growth features, inclusions or laboratory results support natural or synthetic origin, and are they conclusive? provenance
- What evidence establishes or leaves unresolved heating, irradiation, fracture filling or another treatment? measurement
- Which origin and treatment claims may be disclosed as established, and which require explicit qualification? action
Condition and use suitability Relate the actual condition and composition of beryl to proposed specimen, gem or feedstock uses.
Gem appearance, specimen integrity and extraction suitability depend on different evidence and cannot be reduced to a single quality grade.
Gem and specimen integrity
Assess features that affect examination, preservation, cutting and mounting.
Fractures, inclusions and stability
Map condition features and treatment-dependent vulnerabilities relevant to the proposed operation.
- Where are fractures, inclusions, altered zones and any filled fissures relative to proposed cutting or mounting surfaces? measurement
- Which cleaning, cutting or mounting actions are supported by the observed condition and treatment evidence? action
Beryllium feedstock assessment
Assess beryl-bearing material as a potential feedstock using representative measurements.
Recoverable material basis
Keep measured beryl abundance, beryllium content, associated minerals and process acceptance criteria distinct.
- What are the measured beryl fraction, beryllium content and relevant impurities, and how representative is the sampling? measurement
- Which receiving-process specifications must this lot meet before it can be accepted as feedstock? action
Traceability and processing constraints Preserve the evidence chain and determine requirements for handling or transforming beryllium-bearing mineral material.
Beryl assessments must remain attached to the tested material, while processing decisions require attention to physical form and operation-specific exposure.
Locality and report traceability
Distinguish documented locality and identity continuity from unsupported geographic claims.
Specimen-to-evidence link
Connect locality records and laboratory reports to an identifiable specimen or lot, including any subdivision or transformation.
- What records support the claimed locality, and is it documented provenance or an analytical geographic attribution? provenance
- How is the present specimen or lot linked to the material examined in each report after cutting, splitting or mixing? provenance
Form-specific handling
Determine handling and processing requirements from material form, proposed operation and applicable authoritative guidance.
Beryllium-bearing processing review
Record the evidence needed to evaluate dust-generating or chemical operations without transferring classifications from a different beryllium substance.
- Will the proposed operation generate airborne dust, fumes or soluble beryllium-bearing material, and what exposure assessment supports the decision? action
- Which current substance identifiers, hazard classifications and exposure requirements apply to this material form and jurisdiction? boundary
- What controls and verification are required before the proposed processing operation can proceed? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- This is recalled knowledge, not source-verified research; identifier numbers have been omitted.
- Density and optical properties vary with composition and variety; the ranges are approximate identification values.
- Verify applicable treatment-disclosure rules and occupational exposure requirements for the jurisdiction and activity.
- Which of these check these first hold for the sense of beryl this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Emerald
- Aquamarine
- Morganite
- Heliodor
- Goshenite
- Red beryl
- Which of these kinds and varieties hold for the sense of beryl this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Chemical formula - Be3Al2Si6O18 - Ideal end-member composition; natural specimens can contain substitutions, trace elements and channel constituents.
- Which of these identifiers and schemes hold for the sense of beryl this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- CIBJO's Gemstone Book provides nomenclature and treatment-disclosure guidance relevant to beryl gemstones.
- Which of these standards and regulation hold for the sense of beryl this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Faceted gemstones, cabochons and ornamental carvings
- A source mineral for beryllium extraction
- Mineral specimens for collections, teaching and research
- Which of these real-world use hold for the sense of beryl this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Mohs hardness - 7.5-8 - Mohs scale
- Density - Approximately 2.63-2.90 - g/cm³
- Refractive index - Approximately 1.57-1.60 - dimensionless
- Which of these typical measurements hold for the sense of beryl this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Brittleness makes crystals and cut stones susceptible to chipping and fracture despite their high scratch hardness.
- Inclusions and existing fractures can reduce durability, particularly in emerald.
- Heat, solvents and some cleaning methods can damage fracture fillings or alter the appearance of treated stones.
- Cutting, grinding and industrial processing can generate beryllium-containing dust; inhalation risk requires process-specific assessment.
- Which of these failure modes and hazards hold for the sense of beryl this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Deposits differ in trace-element chemistry, inclusions and associated minerals, affecting colour and gem quality.
- The naming boundary between emerald and green beryl can differ among gemological and trade conventions.
- Which of these regional variation hold for the sense of beryl this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Emerald - A green gemstone variety within beryl, rather than a separate mineral species.
- Chrysoberyl - A distinct orthorhombic oxide mineral, BeAl2O4, rather than a silicate variety of beryl.
- Beryllium - The chemical element Be; beryl is a mineral compound containing that element.
- Synthetic beryl - Laboratory-grown material with beryl's essential composition and structure; growth features and inclusions help distinguish it from natural material.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of beryl this model covers, and on what evidence? provenance
What the second pass must settle
- Which authoritative mineralogical references establish diagnostic property ranges and their dependence on beryl composition and measurement conditions?
- Which gemmological naming convention should govern variety boundaries, particularly emerald versus green beryl and heliodor versus golden beryl?
- Which origin and treatment tests are sufficiently diagnostic for each beryl variety, and what conclusions remain unavailable from routine examination?
- Which verified CAS, EC or other identifiers and current hazard or exposure requirements apply to natural beryl, synthetic beryl and mixed beryl-bearing concentrates in the intended jurisdictions?
- Which thermal transformations or decomposition behaviours should replace generic melting and boiling point fields, and under what experimentally documented conditions?