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Natural Stone Definitions

K

Kaolinite

A hydrous aluminum silicate mineral.

Kerf
  1. A slot, either local or continuous, cut into the edge of a stone with a saw blade for insertion of anchors.
  2. The width of a cut when sawing through stone blocks or jointing slabs.
Kerf - Stone Curators
Keystone

The central stone of an arch, sometimes sculpted or otherwise embellished.

Keystone - Stone Curators
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Created in collaboration with the Natural Stone Institute (NSI).
Copyrights apply.
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Office: 76 State Street, Suite 202, Newburyport, MA 01950

Groveland Yard: 934 Salem Street, Groveland, MA 01834

Millis Yard: 102 Acorn Street, Millis, MA 02054

Yard Hours: Monday - Friday, 7 am - 3 pm / closed weekends and holidays | Email us for curated appointments: yards@stonecurators.com

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Office: 76 State Street, Suite 202, Newburyport, MA 01950
Groveland Yard: 934 Salem Street, Groveland, MA 01834
Millis Yard: 102 Acorn Street, Millis, MA 02054
Yard Hours: Monday – Friday, 7 am – 3 pm
Closed Weekends and Holidays
Email For Curated Appointments: yards@stonecurators.com

BE THE FIRST TO HEAR

News and tips from our blog, plus our recent stone finds.

News and tips from our blog,
plus our recent stone finds.

SUBSCRIBE

Copyright © 2025 Stone Curators. All Rights Reserved
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