. . . . . "Silkstone"@en . . . "Silkstone"@en . "2"^^ . . . . . . . . "Silkstone was a fibrous variety of quartz similar to tiger eye."@en . . "Silkstone sphere"@en . . "10"^^ . . . "Silkstone was a fibrous variety of quartz similar to tiger eye."@en . . . . .