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2012-06-14 10:57:58

Symbol: RURO4 Group: Dicot Family: Rosaceae Duration: Perennial Growth Habit: Subshrub Native Status: L48    N Distribution: RubusrossbergianusBlanch. distribution:USA(CT, MA, RI, VT) Classification:       Kingdom   Plantae – Plants Subkingdom   Tracheobionta – Vascular plants Superdivision   Spermatophyta – Seed plants...

2012-06-18 04:57:55

Symbol: CRPE17 Group: Dicot Family: Rosaceae Duration: Perennial Growth Habit: Shrub Native Status: L48    N Distribution: CrataeguspequotorumSarg. distribution:USA(CT) Classification:       Kingdom   Plantae – Plants Subkingdom   Tracheobionta – Vascular plants Superdivision   Spermatophyta – Seed plants Division...

Chalcocite
2005-05-26 11:32:33

Chalcocite, copper(I) sulfide (Cu2S), is an important copper mineral ore. It is opaque, being colored dark-gray to black with a metallic luster. It has a hardness of 2½ - 3. It is a sulfide with an orthorhombic crystal system. Chalcocite is sometimes found as a primary vein mineral in hydrothermal veins. However, most chalcocite occurs in the supergene enriched environment below the...

Word of the Day
omphalos
  • The navel or umbilicus.
  • In Greek archaeology: A central boss, as on a shield, a bowl, etc.
  • A sacred stone in the temple of Apollo at Delphi, believed by the Greeks to mark the 'navel' or exact center-point of the earth.
'Omphalos' comes from the ancient Greek.
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