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Gold With Hornblende & Quartz

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LGM610359

Gold With Hornblende & Quartz

Ex Dr. Krantz, Bonn, Germany
With Antique Label

Description Tabs

Description
Locality: 
Norway
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
7 × 10.5 × 2 cm
Weight: 
216.00gr
Description

This is a sawn and polished gold-bearing quartz rock specimen. Only tiny traces of gold are visible inside the quartz on the polished side (using a loupe); the (rough) backside is much more interesting - it features several areas where small gold leaves are enriched between granular black hornblende - the gold is visible with the naked eye here.

Comes with old Dr. F. Krantz typewriter label dated to the 1950-60's. Unfortunately no exact locality is given.

Mineral Data
What's on the rock

Gold

Formula: 
Au
Strunz: 
1.AA.05
Crystal System: 
Isometric
Hardness: 
2.5 - 3.0

Hornblende

Synonym Of: 

Ferro-hornblende

Formula: 
☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Strunz: 
9.DE.10
Hardness: 
5.0 - 6.0

Magnesio-hornblende

Formula: 
☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
Strunz: 
9.DE.10
Hardness: 
5.0 - 6.0

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

Seller Information

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Seller's terms and conditions

Thank you for viewing my auctions! Maintaining high standards in customer service is extremely important to me. If shipping takes longer than expected, please contact me. It is possible to file an investigation request, and during nearly ten years of e-rocks NO parcel was finally lost.

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I will happily do all in my power to resolve the situation to your satisfaction.

+++IMPORTANT+++
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