We have owner black granite quarry and factory. Specialized maufacturer for tiles, slab, tombstone, cut to size for the project etc
The quarry have three hill.Nearly about 1000 meter.The quarry cover 0.75KM2.
The granite have 77% plaginclase,13%pyro*ene,7-9%olivine,less than 1% biotite,1%magnetite,less than apatite.Because feldspar and pyroxene,olivine alternate with collocate.So have the oolitic texture pattern.
The stone report:
anti-press intensity 1290KG/cm2
anti-fold intensity 280KG/cm2
shearing strength 427KG/cm2
density 3.12g/cm2
water absorbtion 0.08%
acid resistance 99.87%
alkali resistance 100%
glassiness degree 105-120
specific radioactivity internal exposure index (Tra)1.18
external exposure index (Tr) 0.033

