About: rock crystal

Premodifier: rock
Head noun: crystal

Same concepts
http://dbpedia.org/resource/Quartz

Broader concepts

label	provenance	confidence
hard stone	isap:34108904	0.800327
precious material	isap:48508812	0.728017
precious stone	isap:34108919	0.722265
semiprecious stone	isap:34108916	0.721624
natural material	isap:48508909	0.720668
semi-precious stone	isap:34108908	0.635228
mineral	isap:429914793	0.614067
variety of quartz	isap:430701227	0.607939
material	isap:48508791	0.586469
gemstone	isap:51103325	0.539018
stone	isap:34108906	0.538207
quartz	isap:274769055	0.529138
natural stone	isap:34108918	0.450173
variety	isap:430701217	0.447332
crystal	isap:429868178	0.413773

Narrower concepts

label	provenance	confidence
quartz	isap:448183882	0.454504
bead	isap:2468395	0.066590