Rhyolite - 1-kg Pkg.
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Nasco packages its bulk Rock and Mineral Specimens in both 1-kg packages and packages of ten 3 cm x 4 cm specimens. This enables you to order specimens by weight for large projects or in presized specimens ready for lab and students identification.
The picture represents one sample from both the large 1-kg package and the small Bag of 10 (3 cm x 4 cm specimens).
Actual size may vary.