A diamond point — also called diamond rustication, diamond head, or *pointes de diamant* — is a stone or decorative element whose protruding face is cut into four triangular sides, forming a pyramid shape that resembles a polished diamond. The form has been widely used since the Renaissance on facades, plinths, quoins and cornices.
Shape and execution
The typical diamond point consists of a square block of stone whose outer face tapers to a low pyramid. The apex may be sharp or slightly flattened. Sizes range from a few centimetres (cornice decoration) to 30–40 cm (full facade ashlars).
Variants include:
- Diamond head — a four-sided pyramid
- Diamond point — a sharper, more strongly protruding variant
- Flat diamond — a shallow version with a barely visible pyramid
Application
Diamond points appear in several historical periods:
- Renaissance — Italian palazzi such as the Palazzo dei Diamanti in Ferrara, whose entire facade is covered with more than 8,000 diamond ashlars
- Dutch Renaissance — as facade ornament, often combined with bands and strapwork
- Baroque and classicism — on plinths, bases and corner pilasters
- Nineteenth-century revival styles — Neo-Renaissance and Eclecticism reused the form
Materials
Diamond points are typically executed in:
- Natural stone — sandstone, limestone or marble, hand-cut
- Brick — as a moulded or carved facing brick
- Stucco — as applied plaster decoration
- Cast stone or concrete — for modern reproductions
The function is mostly decorative, but on a rusticated base it also adds a visual sense of weight and solidity.
Related terms
- Rustication
- Natural stone
- Facade brick
- Strapwork
- Renaissance
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