Rock butter

Rock butter

Rock butter (also known as stone butter) is a soft mineral substance found oozing from alum slates.

It consists of native alum mixed with clay and oxide of iron, usually in soft masses of a yellowish white colour, occurring in cavities and fissures in argillaceous slate.

References

# http://dict.die.net/rock%20butter/ -- has information from Webster's Revised Unabridged Dictionary (1913)
# [http://www.maden.hacettepe.edu.tr/dmmrt/dmmrt995.html#d20876 Rock Butter] , from the U.S. Bureau of Mines' "Dictionary of Mining, Mineral, and Related Terms" (1996), online at the Hacettepe University Department of Mining Engineering website.


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  • Rock butter — Rock Rock, n. [OF. roke, F. roche; cf. Armor. roc h, and AS. rocc.] 1. A large concreted mass of stony material; a large fixed stone or crag. See {Stone}. [1913 Webster] Come one, come all! this rock shall fly From its firm base as soon as I. Sir …   The Collaborative International Dictionary of English

  • rock butter — noun A butter like exudation from rocks, containing alum • • • Main Entry: ↑rock …   Useful english dictionary

  • ROCK-BUTTER —    a soft mineral substance found oozing from alum slates, and consisting of alum, alumina, and oxide of iron …   The Nuttall Encyclopaedia

  • Butter — is a dairy product made by churning fresh or fermented cream or milk. It is used as a spread and a condiment, as well as in cooking applications such as baking, sauce making, and frying. Butter consists of butterfat, water and milk proteins. Most …   Wikipedia

  • Rock — Rock, n. [OF. roke, F. roche; cf. Armor. roc h, and AS. rocc.] 1. A large concreted mass of stony material; a large fixed stone or crag. See {Stone}. [1913 Webster] Come one, come all! this rock shall fly From its firm base as soon as I. Sir W.… …   The Collaborative International Dictionary of English

  • Rock alum — Rock Rock, n. [OF. roke, F. roche; cf. Armor. roc h, and AS. rocc.] 1. A large concreted mass of stony material; a large fixed stone or crag. See {Stone}. [1913 Webster] Come one, come all! this rock shall fly From its firm base as soon as I. Sir …   The Collaborative International Dictionary of English

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  • Rock builder — Rock Rock, n. [OF. roke, F. roche; cf. Armor. roc h, and AS. rocc.] 1. A large concreted mass of stony material; a large fixed stone or crag. See {Stone}. [1913 Webster] Come one, come all! this rock shall fly From its firm base as soon as I. Sir …   The Collaborative International Dictionary of English

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