emerald

Evidence for emerald material

Records observations supporting beryl identity and checks whether the examined item is a single material.

1. Which optical, microscopic or analytical observations support beryl identity, and which competing identifications remain possible? measurement
2. Is the item a single stone, or are there interfaces, coatings, backing materials or assembled components affecting its appearance? boundary

Colour classification basis

Records the convention and evidence used to apply the emerald name.

1. Under which laboratory or reference convention does this beryl's colour qualify as emerald? definition
2. Does the available colour and colour-causing-element evidence settle the classification, or should the emerald-green beryl boundary remain unresolved? boundary

Growth origin determination

Retains the observations, interpretation and uncertainty behind an origin conclusion.

1. Which observed growth structures, inclusions or analytical results support natural or laboratory-grown origin? provenance
2. What additional examination is needed when the observed features do not distinguish the two origins reliably? action

Support for source claims

Records claimed and assessed origins separately, preserving attribution limits.

1. Is a claimed country or mine supported by traceable records, a laboratory opinion or only an unverified statement? provenance
2. Which measurements, images or identifying features connect each report to this particular emerald? provenance

Observed colour profile

Distinguishes repeatable colour observations from viewing effects and local zoning.

1. What hue, tone, saturation and transparency are observed under specified illumination and viewing orientations? measurement
2. Where are colour zoning, cloudy regions or inclusion concentrations located relative to the intended viewing face? measurement

Geometry-dependent appearance

Records how orientation and working choices affect the emerald's presentation.

1. For a fashioned stone, where are windowing, dark areas, polish defects or edge damage visible under recorded viewing conditions? measurement
2. For proposed cutting or recutting, how would the chosen orientation use colour zoning while avoiding mapped fractures and limiting material loss? action

Fracture and treatment map

Associates surface-reaching fractures, vulnerable areas and suspected or detected filling with locations on the stone.

1. Which fractures reach the surface or intersect corners, thin edges or proposed contact points? measurement
2. What examination supports the presence, type and extent of fracture filling or another treatment, and what could that examination fail to detect? measurement

Condition-dependent actions

Records action-specific decisions and the uncertainties that require specialist assessment.

1. Given mapped fractures and known or uncertain fillers, which proposed cleaning, heating, ultrasonic, solvent, polishing or setting operations require specialist assessment before proceeding? action
2. Which growth-origin and treatment statements can be disclosed from the evidence, and which claims must remain qualified or unknown? boundary
3. After an intervention, which images, measurements and treatment observations must be repeated to establish the emerald's new state? action

Kinds and varieties

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these kinds and varieties hold for the sense of emerald this model covers, and on what evidence? provenance

Identifiers and schemes

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these identifiers and schemes hold for the sense of emerald this model covers, and on what evidence? provenance

Standards and regulation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these standards and regulation hold for the sense of emerald this model covers, and on what evidence? provenance

Real-world use

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these real-world use hold for the sense of emerald this model covers, and on what evidence? provenance

Typical measurements

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these typical measurements hold for the sense of emerald this model covers, and on what evidence? provenance

Failure modes and hazards

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these failure modes and hazards hold for the sense of emerald this model covers, and on what evidence? provenance

Regional variation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these regional variation hold for the sense of emerald this model covers, and on what evidence? provenance

Neighbouring kinds and how to tell them apart

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these neighbouring kinds and how to tell them apart hold for the sense of emerald this model covers, and on what evidence? provenance