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Makatite & Zakharovite

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LMB626027

Makatite & Zakharovite

Rare Mineral

Description Tabs

Description
Locality: 
Demix-Varennes Quarry, Varennes & St-Amable, Montérégie, Québec, Canada
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
0.8 × 1.6 × 1.2 cm
Weight: 
2.00gr
Description

Makatite and zakharovite are very rare minerals, reported from only a few localities. The Demix-Varrenes quarry is a good place to find both of these minerals, but they are fairly rare here as well, and are usually not found together. This is a small, but excellent example of both species. It is from a hydrothermalite that was also rich in varennesite.

The first pair of close-up photos (FOV 6.8 x 4.5 mm) emphasizes the makatite, which is pale greenish and fibrous. The dark areas in the makatite are terminations of natrolite crystals. (The natrolite is colorless, but looks dark when viewed down-axis.)

The second pair of photos (FOV 4.5 x 6.9 mm) emphasizes the orange-yellow zakharovite. It looks grainy, but the crystals are actually hexagonal. However they are exceedingly tiny. Even with 60X, I can make out only a few clearly hexagonal shapes. Under high magnification, the darker areas in the zakharovite appear to be brownish-orange ‘lumps” – not natrolite terminations. I don’t know what they are.

Single item shipping weight is 2.9 oz (82 g). For shipments outside the USA, up to a total weight < 8 oz (225g), this can be combined with items from this or other auctions for the same postage.

Within the USA, postage increases by about $0.20 per ounce. Above 13 oz, I will use Priority Mail ($9.25 including packing). 

Mineral Data
What's on the rock

Makatite

Formula: 
Na2Si4O8(OH)2·4H2O
Strunz: 
9.EE.45
Crystal System: 
Monoclinic
Hardness: 
0.0
Colour: 
white
Type Locality: 
Lake Magadi, South Rift Valley, Rift Valley Province, Kenya

Zakharovite

Formula: 
Na4Mn5Si10O24(OH)6·6H2O
Strunz: 
9.EE.65
Crystal System: 
Trigonal
Hardness: 
2.0
Colour: 
Yellow
Type Locality: 
Karnasurt Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...
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.