How do you find a mineral deposit?

To find a mineral deposit, geologists study the geology of a lot of places. They then go to a spot where that type of mineral deposit could be found. They test the properties of the soil and rocks. They look at the chemistry and the physical properties.

Where is Vesuvianite found?

Vesuvianite occurs as tetragonal crystals in skarn deposits and limestones that have been subjected to contact metamorphism. It was first discovered within included blocks or adjacent to lavas on Mount Vesuvius, hence its name. Attractive-looking crystals are sometimes cut as gemstones.

Where is Allanite found?

Allanite is known in France in the pegmatites of the pink granites of Ploumanac’h in the Côtes d’Armor where crystals can reach 11 cm, and in beautiful brown gemmy crystals (up to 3 cm) on dolomite of the large talcum deposit of Trimouns in Ariège.

Where is Vivianite found?

St Agnes, Cornwall
Vivianite was discovered at Wheal Kind, in St Agnes, Cornwall.

How can you tell if a rock has gold in it?

You’re looking for a scratch on the glass. If the glass gets scratched from the ‘gold’, it’s not actually gold. Since glass has a hardness of around 5.5 it will only be scratched by harder minerals like pyrite and quartz. If the glass doesn’t scratch then that’s a great sign – you likely have gold in your rock!

How can you tell if a rock is gold ore?

Real gold also leaves a gold streak when scratched against a small bit of unglazed ceramic, like the back of a piece of bathroom tile, but iron pyrite leaves a greenish-black colored streak. In your gold hunting kit, a small magnet, piece of glass and a bit of unglazed tile can help you identify real gold in a flash.

Is vesuvianite a rare mineral?

Also called Idocrase. A relatively common mineral of the silicates and germanates class. Gem quality is very rare, however.

How do you identify vesuvianite?

Vesuvianite is usually translucent and green, yellowish green, or brownish green in color. Rare specimens can be colorless, white, blue, pink, purple, violet, red, or black. Some crystals exhibit color zoning. Vesuvianite always has a white streak and a Mohs hardness of approximately 6.5.

How do you identify a zircon in a thin section?

Distinguishing Features Zircon is not usuall seen in hand sample; when it is, it may be distinguished by crystal habit and hardness. In thin section, Zircon is found in the form of small crystals included in other minerals, showing very high relief and high-order interference colors.

What is vivianite worth?

$4,000.00 €3,687 £3,070.00 approx. This specimen is priced in US dollars, all other prices are approximate. A spectacular, off-matrix specimen of beautifully crystallised Vivianite from the tin-mining region around Llallagua at Rafael Bustillo in Potosí, Bolivia.

Is vivianite a rare mineral?

Vivianite, named after the English mineralogist F. G. Vivian, is a rare mineral of secondary origin associated with pyrite in copper and tin veins, and is a hydrated iron phosphate of a blue to green color.