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EGG707 Larvikite

EGG707 Larvikite

$12.00

Here’s a fabulous new item, a  Larvikite  egg. It has an amazing and captivating “shimmer”, color and design.  It measures approximately 1 7/8″ tall x 1 3/8″ in diameter and has a nice polish. A great egg to add to your egg collection or give as a gift.

This is a similar to like item as they are all very close to appearance and size.

In stock

Description

Larvikite is an igneous rock, specifically a variety of monzonite,notable for the presence of thumbnail-sized crystals of feldspar. These feldspars are known as ternary because they contain significant components of all three endmember feldspars. The feldspar has partly unmixed on the micro-scale to form a perthite, and the presence of the alternating alkali feldspar and plagioclase layers give its characteristic silver-blue schiller effect (called labradorescence) on polished surfaces. Olivine can be present along with apatite, and locally quartz. Larvikite is usually rich in titanium, with titanaugite and/or titanomagnetite present.

Larvikite occurs in the Larvik Batholith (also called the Larvik Plutonic Complex), a suite of ten igneous plutons emplaced in the Oslo Rift (Oslo Graben) surrounded by ~1.1 billion year old Sveconorwegian gneisses. The Larvik Batholith is of Permian age, about 292–298 million years old. Larvikite is also found in the Killala Lake Alkalic Rock Complex near Thunder Bay in Ontario, Canada.

The name originates from the town of Larvik in Norway, where this type of igneous rock is found. Many quarries exploit larvikite in the vicinity of Larvik.

Additional information

Weight0.25 lbs
Dimensions1.875 × 1.875 × 1.375 in

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