Crystal
Glass with at least 10 percent by mass of lead, barium, zinc or potassium oxide, singly or together, and a refractive index of at least 1.520, with lead crystal at or above 24 percent lead oxide, as Directive 69/493/EEC classes it.
Also called crystal glass, lead crystal.
How it connects
In other taxonomies
- Crystal glassUniclass, Ma_40_35_46_19theirs is narrower
- crystal (lead glass)Getty AAT, 300010814theirs is narrower
- crystalWikidata, Q359572theirs is narrower
For developersRecord, identifiers and graph
Where it sits
One rule per term beside it, taller for each narrower term
Record
- Also called
- crystal glass · lead crystal
- Broader
- Glass
- Provenance
- referencedcomposition dictionary in a materials-retrieval system (src-05); Council Directive 69/493/EEC, https://www.legislation.gov.uk/eudr/1969/493/annexes/data.xht, read 22 Sep 2026
For machines
Permanent address
/id/material/crystalKnowledge graph
Stored incoming and outgoing relations from the public V1 graph. Ancestors, descendants, and siblings are labelled as derived views rather than stored facts.
- has-conceptMaterialincoming
- has-conceptMaterialincoming
- belongs-to-axisMaterialoutgoing
- belongs-to-facetMaterialoutgoing
- broaderGlassoutgoing
- narrowerGlassincoming
Derived hierarchy views
- ancestor (derived)Glassoutgoing
- ancestor (derived)Mineraloutgoing
- sibling (derived)Glass fibreoutgoing
Crosswalks
| Scheme | Identifier | Their label, or the search | How close |
|---|---|---|---|
| Uniclass | Ma_40_35_46_19 | Crystal glass | theirs is narrower |
| Getty AAT | 300010814 | crystal (lead glass) | theirs is narrower |
| Wikidata | Q359572 | crystal | theirs is narrower |