a luxury status and high prices.

The use of hydroxyapatite compounds, derived from rock sources, rather than bone ash has increased since the 1990s. If they are used appropriately, the resultant ceramic material conforms to accepted definitions of bone china, and the properties and appearance are indistinguishable from those using naturally derived bone ash.

Mineralogy

Bone china consists of two crystalline phases, anorthite (CaAl₂Si₂O₈)

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