Алебастр: вид материалов
The scaglione is the most famous white alabaster, more or less transparent depending on where its found. Its found in blocks that varies from 20-30 kg. to 1000kg. Also blocks of 2500 kg. have been found, but the procedures of mining risk to compromise the compactness of the stone.
The agate is the most precious alabaster, the most rare the hardest and therefor also the most difficult to carve. The yellow colour varies from very pale tonalities to a dark brown colour. The maximum of the blocks doesnt exceed in weight 300 or 400 kg.
The bardiglio is found with a number of different tonalities, veinings and colourings. The most common is grey, beige or orange-coloured and it has a marbled look. The weight of the blocks varies between 15 and 300 kg.
The cinerino is a grey stone with a colour similar to clay. Its always opaque and the blocks doesnt exceed in weight 150 kg.
The gabbro is an intensely marbled alabaster with dark colours as brown, black or red. The weight of the blocks varies from 20 to 500 kg.
The yellow stone is a luminous alabaster with a more or less intense colour, sometimes almost white. Unfortunately, at present is it very difficult to find. The alabaster blocks have a weight that varies from 20 to 400 kg.
Pietra a marmo
The name derives from the great resemblanc to the white marble. Its found in blocks that varies from 30 to 1000 kg. Egg-shaped and with a milky white colour with or whitout veins. Being an alabster found in the superficial layer of the ground, its the most economic to quarry.
Its a kind of alabaster found in open quarries. Its transparency varies from glas trasparence to opaline transparence, with or without veins. Depending on where its quarried it may have more or less evident black, grey or brown veins. Due to its transperency its mostly used for lightning.
The alabaster, being a crystallized gypsum and therefor very porous, can easilly be dyed. The alabaster item to colour is put into a colour-bath for a fixed time depending on which intensity we want of the colour, and this method is used on both transparent and opaque alabaster.