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Tourmaline Var Schorl

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LGM594638

Tourmaline Var Schorl

Ex Dr. Krantz, Bonn, Germany
With Antique Label

Description Tabs

Description
Locality: 
Unknown - Minas Gerais, Minas Gerais, Brazil
Class: 
Single Crystal
Size Range: 
Small cabinet (7-10 cm)
Size: 
3 × 8 × 3.5 cm
Largest Crystal: 
8.00cm
Weight: 
163.00gr
Description

Two pieces of common black schorl, opaque, with typical striation. The size is given for the bigger specimen, the smaller one is 3.7 x 2.2 x 1.8 cm.

Comes with nice antique hand-written Isaac Walker label, dated 1827! The label means: 'Two new forms in dark tourmaline - Brazil'
The central number is the date of the auction, and the lot number is on the right. The 'C' letter is a code for specimens with origin Alexander Crichton collection.

Mineral Data
What's on the rock

Tourmaline

Formula: 
A(D3)G6(T6O18)(BO3)3X3Z
Crystal System: 
Trigonal
Hardness: 
7

Schorl

Formula: 
Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Hardness: 
7.0

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

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.

If for any reason you are not happy with any aspect of your transaction, please let me know as soon as possible, ideally within 1 week of receiving your specimen.

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

+++IMPORTANT+++
Paypal is NOT accepted within Germany! I will charge a supplement of 2.5% for paypal payments within Germany. Bank transfer / offline payment is without costs and usually also completed within one day.
Within EU countries, bank transfer is also possible but not mandatory. I will offer free shipping or a discount in some cases. Please ask after receiving your invoice.

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