Stones can have many aliases. This is due to language differences, supplier choice, coloquial trends or slang, or sometimes errors and ambiguity between rocks. Read more here.
|Emerald Black, Labrador Black|
Commercial classification sometimes differs to the scientific, geological designation. In particular, some limestones are deemed marble especially if they take a high polish. Read more here.
|Age||250-290 million years (Permian)|
MOHS is the standard scale of hardness for minerals 1-10, with 10 being the MOHS of diamond. We also use the broad terms Hard and Soft for simplicity. Read more here.
|Origin||Norway – Larvik|
A medium to coarse-grained, dark-grey syenite with a touch of green.
Similar granite deposits quarried in India.
Petrology: Blue-green syenite (larvikite) of the Permian period. It has a dark colour with a few iridescent feldspars. Syenite: A coarse-grained intrusive igneous rock of the same general composition as granite but with the quartz either absent or present in relatively small amounts (<5%). The feldspar component of syenite is predominantly alkaline in character (usually orthoclase). Plagioclase feldspars may be present in small quantities, less than 10%.