Download BIANCO CRISTAL

BIANCO CRISTAL
Hardness:
Structure:
Synonyms:
Group:
Petrographic assignment:
Age:
Colouring minerals:
Average hardness:
Deposit:
hard
homogeneous structure
Blanco Cristal, White Cristal
Plutonic rocks - Plutonite
Granite
300 million years (carboniferous)
White and ivory feldspar, grey transparent quartz, black biotite
6 (according to Mohs's hardness scale 1-10) / Natural stone
Spain - in the Sierra de Credos, south-east of Madrid, near the village of
Cadaloso de los Vidrios
Petrography:
The mountains of Central Spain are famous for their enormous granite content from which the brighter types in
particular are quarried. Bianco Cristal is among the most popular of stones, one of the lightest coloured of
Europe's granites. It has up to 1 cm.- sized orthoclase feldspars, some of which, in the centre, can be slightly
ivory -hued, alternating with smaller purely white plagioclase feldspars. The quartz occurs in a bright grey
colour or is transparent like glass. The upper portions of the Bianco Cristal fractures may discolour to lightly
yellow due to oxidation of the iron-containing mica portions.
Petrogenesis:
Bianco Cristal was created from a bright feldspar and quartz-rich magma that slowly crystallised in the lower
earth crust. As a result of the even cooling process over millions of years, a uniform grain system was built up.
Hint: The close-up view of each stone type shows a relatively true image of the crystalline structure and the
colouring. This is suitable for grained slabs to a limited extend only. In regard to the colour matching, please
take an original sample of the stone from your furniture store as a basis.