Stone Listing by Hardness
Crystals and Minerals vary in their "hardness". As defined by Wikipedia, Mohs scale of mineral hardness
"characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material".
Alphabetical List by Stone Type - This is an alphabetical list of crystals and minerals with hardness information. Use this list to find the hardness of any stone.
Stones Grouped by Hardness -This is a list of crystals and minerals that have been sorted into groups based upon their hardness.
- If you don't see a stone listed, either contact us to let us know, or register and post the information yourself.
Created by System Administrator.
Last Modification: Monday 29 of June, 2009 12:41:24 EDT by kristi
. (Version 8)
- + : A leading plus sign indicates that this word must be present in every object returned.
- - : A leading minus sign indicates that this word must not be present in any row returned.
- By default (when neither plus nor minus is specified) the word is optional, but the object that contain it will be rated higher.
- < > : These two operators are used to change a word's contribution to the relevance value that is assigned to a row.
- ( ) : Parentheses are used to group words into subexpressions.
- ~ : A leading tilde acts as a negation operator, causing the word's contribution to the object relevance to be negative. It's useful for marking noise words. An object that contains such a word will be rated lower than others, but will not be excluded altogether, as it would be with the - operator.
- * : An asterisk is the truncation operator. Unlike the other operators, it should be appended to the word, not prepended.
- " : The phrase, that is enclosed in double quotes ", matches only objects that contain this phrase literally, as it was typed.
