Ward's® Obsidian

Supplier: Avantor

Ward's® Obsidian

Ward's® Obsidian

470026-136EA 16.89 USD

470026-136 470026-138 470026-140

Ward's® Obsidian

Specimens Rock Specimens Igneous Rocks

Shiny black volcanic glass showing conchoidal fracture and some spherulites.

Información para pedidos: WARD’S offers different specimen sizes to meet your various needs. Student specimens are ideal for students to use for study and identification. Student specimens range in size from 1×1" to 1×2" and come in packages of ten. Hand Specimens are great for lectures, demonstrations, and display. Hand specimens range in size from 2×3" to 3×4", and each comes in a labeled plastic tray. Bulk pack includes several of the smaller pieces that are suitable for classroom study, while the larger specimens in the one kilogram pack can be cut to sizes that meet your specific needs. The number and size of pieces will vary. Testing chips are convenient for physical identificationtests, and are available for selected minerals and rocks commonly used in labs. Specimens range in size from ¹/₂to ³/₄" and come in class-sized packages of 30.

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