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Allactite & Chlorophoenicite

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LMB170982

Allactite & Chlorophoenicite

Ewald Gerstmann

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Description
Locality: 
Sterling Mine, Ogdensburg, Sussex County, New Jersey, United States of America
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.5 × 2.5 cm
Description

This is a micro. There are several sprays of bladed dark purplish-brown allactite to about 1½ mm. You will need 20-40X to view them.

Some of the blades in the first photo are terminated, but the franklinite grain on the left probably contacts most of the terminations.

The specimen is full of small solution cavities many of which have allactite and/or chlorophoenicite. The second photo shows some of the other allactite sprays. Tip-to-tip, the two spays otiented roughly NW to SE span a bit < 2½ mm.

The third photo shows some of the chlorophoenicite, a minor accessory on the specimen. The “mousy” spray on the left is 1 mm L to R, the jackstraw aggregate on the right is 0.9 mm in diameter. There is also some more allactite (e.g. lower left) and some miniscule pale pink “rhodochrosite’.

The red-orange grains are willemite. Black is franklinite. There are also a few very tiny pink rhodochrosite (?) rhombs.

Small, but rare.

Weight 0.6 oz. This could be sent in a padded envelope for $7 (less in the USA).

Mineral Data
What's on the rock

Allactite

Formula: 
Mn2+7(AsO4)2(OH)8
Strunz: 
8.BE.30
Crystal System: 
Monoclinic
Hardness: 
4.5
Type Locality: 
Moss mine, Nordmark (Nordmarksberg), Filipstad, Värmland, Sweden

Chlorophoenicite

Formula: 
(Mn,Mg)3Zn2(AsO4)(OH,O)6
Strunz: 
8.BE.35
Crystal System: 
Monoclinic
Hardness: 
3.0 - 3.5
Streak: 
colorless
Type Locality: 
Buckwheat pit (Southwest opening; Buckwheat Mine), Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
LMB minerals

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

In addition to the standard terms and conditions, please note the following. Almost all IDs are visual. While in most cases the ID is obvious, there may be cases where it is not. If you are doubtful about a particular ID, please ask for more information. Or do not bid! Similarly, if you are not sure that the specimen meets your criteria, do not bid. I have tdone the best I can with the photos. Nevertheless, if you are not happy with a specimen for any reason, I will refund the bid price – but not the shipping costs (unless the fault is clearly mine) – if the specimen is returned. This policy applies even if analysis of the specimen shows that my ID was incorrect. When in doubt, ask - or don’t bid. Note that most crystals at MSH and Varennes are micros - even if on large specimens. Please pay attention to the stated sizes. Any customs duties, fees etc. are the responsibility of the buyer.

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