Olivina is a mineral which can be found in certain types of rock. These rocks are typical to Lanzarote and one of the places you can find the rocks in abundance is El Golfo on the west coast.
Olivina gets its name from its olive green colour and being translucent is comonly used as a gem stone. Costume jewelry can be found all over the island made from these stones.
Apart from jewelry the mineral can does have other uses, although these are not manufactured in Lanzarote but in other parts of the word where olivina has been found it is used for:
The aluminium foundry industry uses olivine sand to cast objects in aluminium. Olivine sand requires less water than silica sands while still holding the mold together during handling and pouring of the metal. Less water means less gas (steam) to vent from the mold as metal is poured into the mold
In Finland, olivine is marketed as an ideal rock for sauna stoves because of its comparatively high density and resistance to weathering under repeated heating and cooling. Olivine is also used to tap blast furnaces in the steel industry, acting as a plug, removed in each steel run.
Mg-rich olivine has also been discovered in meteorites, on the Moon and Mars,falling into infant stars, as well as on asteroid 25143 Itokawa. Such meteorites include chondrites, collections of debris from the early Solar System; and pallasites, mixes of iron-nickel and olivine.
The spectral signature of olivine has been seen in the dust disks around young stars. The tails of comets (which formed from the dust disk around the young Sun) often have the spectral signature of olivine, and the presence of olivine was verified in samples of a comet from the Stardust spacecraft in 2006. Comet-like (magnesium-rich) olivine has also been detected in the planetesimal