Counterfeit Density Flag Checker
Density outside actual independently verified matched issue/material band is a review flag only, not counterfeit proof, alloy inversion or safe immersion test. Volume/mass uncertainty, plating, geometry and porosity remain.
Description
Bulk density is mass divided by volume and can be compared with an issue-specific reference interval.
Bulk density is mass divided by volume and can be compared with an issue-specific reference interval.1
An out-of-band result is a review flag whose interpretation depends on measurement quality and composition.
When to use Counterfeit Density Flag Checker
Use this tool to calculate or review the supplied observations under the stated rules. Establish the coin issue, source edition, measurement basis and reference date where applicable.
How to use Counterfeit Density Flag Checker and understand its results
- Establish the coin issue, source edition, measurement basis and reference date where applicable.
- Enter observedMassGrams, independentlyMeasuredVolumeCubicCentimeters, callerMatchedDensityLower, callerMatchedDensityUpper, using the field meanings and rules below, then run the tool.
- Read result. Inspect nested result fields where present, and review unknown records separately from known matches.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedMassGrams | Observed mass grams | number | Required |
| independentlyMeasuredVolumeCubicCentimeters | Independently measured volume cubic centimeters | number | Required |
| callerMatchedDensityLower | Caller matched density lower | number | Required |
| callerMatchedDensityUpper | Caller matched density upper | number | Required |
Require positive mass grams, volume cubic centimetres and lower density; require upper≥lower. Calculate g/cm³ and flag only density < lower or density > upper. Equality to either bound is not flagged.
density=mass/volume; review=density<lower or density>upper Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Calculated observation or qualified reference | object |
| result.observedDensityGramsPerCubicCentimeter | observed Density Grams Per Cubic Centimeter | number |
| result.outsideCallerDensityBand | outside Caller Density Band | boolean |
{
"input": {
"observedMassGrams": 10,
"independentlyMeasuredVolumeCubicCentimeters": 1,
"callerMatchedDensityLower": 9,
"callerMatchedDensityUpper": 11
},
"output": {
"result": {
"observedDensityGramsPerCubicCentimeter": 10,
"outsideCallerDensityBand": false
}
}
}Limitations and assumptions
Coin identification, reference applicability and measurement uncertainty require separate evidence. A returned explanation or arithmetic agreement does not establish authenticity, a certified grade or a current market value.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Extremely large composite outputs are rejected.
Alternative or Complementary methods
For a related step, use Morgan Peace Weight Checker: Original Morgan and Peace silver dollars have a nominal mass that can be compared with a measurement. For a complementary comparison, use Magnet Response Precious Checker: Magnetic attraction should be compared with the expected response of the identified alloy and issue.
References
-
Counterfeit Density Flag Checker — tool.io
Similar or alternative tools
- Morgan Peace Weight Checker
Original Morgan and Peace silver dollars have a nominal mass that can be compared with a measurement.
- Magnet Response Precious Checker
Magnetic attraction should be compared with the expected response of the identified alloy and issue.