Alabaster

Alabasters refer to a type of translucent or semi-translucent mineral that is prized for its ornamental value and its ability to be carved into various decorative objects. Alabaster is a form of gypsum, which is a soft mineral that is easily carved and polished to create a smooth surface. There are several types of alabasters, with the most common being white alabaster. However, rare examples come in a variety of colours, patterns, and textures that make them highly sought after by collectors and artisans. Some examples of rare alabasters include:

1. Black alabaster - This is a rare type of alabaster that is black or dark gray in colour. It is found in small quantities in Egypt and Italy.
2. Onyx alabaster - This is a type of alabaster that has banding of different colours. It is found in Mexico, Utah, and Italy.
3. Brecciated alabaster - This type of alabaster has a fractured appearance and is made up of fragments of other minerals. It is found in Utah.
4. Aragonite alabaster - This is a type of alabaster that has a yellow or orange colour. It is found in Spain and Mexico.
5. Cipollino alabaster - This is a type of alabaster that has a green or gray colour and veining that resembles onionskin. It is found in Italy.

These rare alabasters are highly prized for their unique beauty and rarity, and are often used in the creation of decorative objects such as lamps, vases, and sculptures.