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Glauconite

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CSW166630

Glauconite

Description Tabs

Description
Locality: 
Port Muck, Island Magee, County Antrim, Northern Ireland, United Kingdom
Size Range: 
Miniature (4.5-7 cm)
Size: 
3 × 4.5 × 3 cm
Description

A specimen of glauconitic sandstone from an isolated outcrop of the Hibernian Greensand Formation on Islandmagee. The glauconite forms deep green crystal aggregates which have formed as internal casts of coccolith shells. Other constituents of the sandstone may include zircon and tourmaline.

Mineral Data
What's on the rock

Glauconite

Formula: 
(K,Na)(Fe3+,Al,Mg)2(Si,Al,Fe3+)4O10)(OH)2
Hardness: 
2.0
Streak: 
None

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Thank you for viewing my auctions. It goes without saying that maintaining high standards in both specimen quality and customer service are extremely important to me. If for any reason you are not happy with any aspect of your transaction then 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. If your specimen is damaged upon delivery simply send me some photos to verify this and I'll provide you with a full refund or a replacement specimen, whichever you prefer.