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AMM1089450

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Description

Locality:

Ilfeld, Nordhausen, Harz, Thuringia, Germany

Class:

Crystals on Matrix

Size Range:

Cabinet (10-18 cm)

Size:

11 × 7.5 × 3.5 cm

Largest Crystal:

1.50cm

Description

Excellent specimen with numerous well-formed manganite crystals with beautiful luster. Fragments of the surrounding calcite can be seen next to the manganite crystals, which also provides a nice contrast. The other flank of the specimen is almost completely covered with small, highly lustrous braunite crystals. Furthermore, it is easy to observe that large parts of the specimen show a perimorphosis from manganite/braunite to calcite in addition to the manganite crystals. The scalenohedral shape of the calcite is clearly visible, but the crystals are hollow from the inside, so that only the marginal body of manganite/braunite has remained. Interesting and well-formed specimen with beautiful manganite crystals, abundant braunite and a perimorph to calcite.

Mineral Data

What's on the rock

Manganite

Formula:

Mn³⁺O(OH)

Strunz:

4.FD.15

Hardness:

4.0

Type Locality:

Manganese deposit, Ilfeld, Nordhausen, Harz, Thuringia, Germany

Braunite

Formula:

Mn²⁺Mn³⁺₆(SiO₄)O₈

Strunz:

9.AG.05

Hardness:

6.0 - 6.5

Streak:

Black

Type Locality:

Oehrenstock (Öhrenstock), Langewiesen, Ilmenau District, Thuringian Forest, Thuringia, Germany

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$10

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Start	22 Dec 18:00
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Shipping Information

Postage Area	Price
Germany (insured parcel) < 3 kg: 6 $	$6
Germany (insured parcel) > 3 kg - 10 kg: 9.50 $	$9.50
Worldwide, tracked < 1 kg: 9.50 $	$9.50
Worldwide, tracked > 1 kg up to 2 kg: 28 $	$28
European Union, tracked > 1 kg up to 2 kg: 18 $	$18

Seller Information

Dr. A. Matthies Minerals

Payment options: offline, paypal_wpp, paypal_wps

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Accepted payment methods: PayPal, bank transfer.

Money back guarantee is valid until 14 days after receiving the payment. The refund will be initiated immediately upon receiving the minerals back. Due to the return time, there may be a delay in the refund.