Download JUPARANA COLOMBO

JUPARANA COLOMBO
Hardness:
Structure:
Synonyms:
Group:
Petrographic assignment:
Age:
Colouring minerals:
Average hardness:
Deposit:
hard
slab with irregular pattern
Mauve Juprana, River rose
Metamorphite
Gneiss - Migmatite
900 million years (Precambrian)
Salmon pink feldspar, clear quartz, white feldspar, black biotite, metallic flakes
of magnetite
6 (according to Mohs's hardness scale 1-10) / Natural stone
Sri Lanka - in the vicinity of the capital Colombo
Petrography:
Yellowish-brown to ochre yellow and pink-yellow, largely medium-sized grained migmatite. Juparana Colombo
has an extensive texture, which is intensified by biotite streaks, ribbons and nests. The mineral fraction
consists of light feldspar, which gets the various shades of red from haematite inclusions. The stone gets its
rich on contrast grey ribbon structure from ribbon-like biotite inclusions.
Petrogenesis:
The Colombo/Sri Lanka Gneiss complex developed on the South Indian Shield during the Precambrian Period.
At that time, India and Sri Lanka were still one continent. Original rock, granite or granite-like, as well as
sediments made up of various components were pushed into the lower earth crust, where partial re-melting
took place under very high pressures and temperatures.
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.