Item#45: AUR / GOLD

Aurul se formează în depozite pneumatolitice-hidrotermale venoase asociate cu cuarţ, în şisturi cristaline metamorfice sau ca zăcăminte secundare aluvionare. Cele mai frumoase cristale de aur provin din Munţii Apuseni. Cele mai mari zăcăminte sunt în Africa de Sud – Wittwatersand şi Transvaal.

Culoare: variază în funcţie de conţinutul de argint şi cupru (galben deschis – roşu oranj), dar şi alte impurităţi.

Urma: aurie

Luciu: metalic

Clivaj: absent

Duritate: 2,5 -3

aur

Gold is formed in hydrothermal deposits, often associated with quartz, in metamorphic rocks and secondary sedimentary  deposits. The most beautiful gold crystals are found in Apuseni Mountains form Romania.

Color: it varies from yellow-gold to red-ish orange, due to silver and copper and other impurities.

Streak: gold

Luster: metallic

Cleavage: none

Hardness: 2,5 -3

The photo can be used provided the source is acknowledged.

One thought on “Item#45: AUR / GOLD

  1. Pingback: Item#45: AUR / GOLD

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s