
1) Calcium mineral 2) Clay
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https://www.crosswordclues.com/clue/bentonite

Bentonite is an absorbent aluminium phyllosilicate, impure clay consisting mostly of montmorillonite. The absorbent clay was given the name bentonite by Wilbur C. Knight in 1898, after the Cretaceous Benton Shale near Rock River, Wyoming. There are different types of bentonite, each named after the respective dominant element, such as potassium (K...
Found on
http://en.wikipedia.org/wiki/Bentonite

clay formed by the alteration of minute glass particles derived from volcanic ash. It was named for Fort Benton, Mont., near which it was discovered.[4 related articles]
Found on
http://www.britannica.com/eb/a-z/b/50

A clay which, in very pure form, is used to fine wines, especially white wines for the purpose of correcting heat instability. When stirred into a wine, the bentonite absorbs excessive yeast protein from the wine and holds it tightly. Under some conditions, this protein could later cause a cloud, haze or sediment to form in the wine if not removed....
Found on
http://www.edenwines.co.uk/Glossary_b.html

A type of clay used in wine clarification.
Found on
http://www.encyclo.co.uk/local/20673

<chemical> Bentonite. A native, colloidal, hydrated aluminum silicate which, on the addition of water, swells to produce a slippery paste. Its chief pharmaceutical use is as a suspending agent and it has also been used as a bulk laxative. ... Chemical name: Bentonite ... (12 Dec 1998) ...
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http://www.encyclo.co.uk/local/20973

A clay that can be used as a fining agent.
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http://www.encyclo.co.uk/local/21497

A collodial clay (hydrated aluminium silicate that has the property of forming viscous suspensions (gels) with water) that is used as a carrier in pesticide dusts to increase their adhesive properties.
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http://www.encyclo.co.uk/visitor-contributions.php

A colloidal clay, expansible when moist, commonly used to provide a tight seal around a well casing.
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http://www.encyclo.co.uk/visitor-contributions.php

a colloidal clay, composed primarily of montmorillonite, that swells when wet. Because of its gel forming properties, bentonite is a major component of water-base drilling muds. See gel, mud.
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http://www.encyclo.co.uk/visitor-contributions.php

Special 'clay' which acts as a 'fining' agent for the wine, in order to avoid the formation of a sediment in the bottle.
Found on
http://www.hintsandthings.co.uk/livingroom/glossaryB.htm

Type: Term Pronunciation: ben′ton-īt Definitions: 1. Native colloidal hydrated aluminum silicate; an absorbent clay found in the western U.S.; it is sometimes used to treat diarrhea and skin disorders and was used as a suspending agent in lotions.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=9945

A natural clay which is used in fining (clearing) wines.
Found on
http://www.nebraskawines.com/wine-glossary/

[
n] - an absorbent aluminum silicate clay formed from volcanic ash
Found on
http://www.webdictionary.co.uk/definition.php?query=bentonite

A colloidal clay derived from volcanic ash and employed as a binder in connection with synthetic sands, or added to ordinary natural (clay-bonded) sands where extra strength is required.
Found on
https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/

A colloidal clay, expansible when moist, commonly used to provide a tight seal around a well casing.
Found on
https://www.encyclo.co.uk/local/20094
noun an absorbent aluminum silicate clay formed from volcanic ash
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https://www.encyclo.co.uk/local/20974

A purified natural clay that is used in fining white wines for the purpose of correcting heat instability. When stirred into a white wine, the Bentonite particles quickly glom onto the larger molecules of protein in the wine, collecting them as the Bentonite settles to the bottom of the wine tank. Later, the act of removing the Bentonite from the t...
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https://www.encyclo.co.uk/local/22305

A very fine clay used as a fining or clarifying agent in wine to remove protein, to achieve Heat Stabilization or to remove another fining agent.
Found on
https://www.encyclo.co.uk/local/22309

A type of fine clay that is added to white wine during its making to remove proteins. This is done to minimise the chance that the proteins will denature and form a haze in the bottle when left in a warm place.
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https://www.encyclo.co.uk/local/22313

A type of clay that is used in the process of fining. Clay is mixed into wine to clarify it. As it settles to the bottom, the clay absorbs and carries with it suspended particles.
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https://www.encyclo.co.uk/local/22314

A clay with great ability to absorb water and which swells accordingly.
Found on
https://www.encyclo.co.uk/local/22734

emulsifierEmulsifier. Can block pores, effectively suffocating it and contributing to acne.
Found on
https://www.encyclo.co.uk/local/22769

a clay formed by the decomposition of volcanic ash, having the ability to absorb large quantities of water and to expand to several times its normal volume.
Found on
https://www.infoplease.com/dictionary/bentonite
No exact match found.