• Material: Dysprosium;
• Purity: Dy/TREM 99.9%, TREM 99%;
• Size: diameter1.5inch×3.5mm thickness;
• Surface quality: two sides and cylinder fine ground.
• Theoretic weight: 34.08grams.
• Actual weight: 34.1grams(1.09troy oz);
• On the front side: laser engraved Paul-Émile Lecoq de Boisbaudran, element discoverer's picture, atomic number, standard atomic weight, density, melting point, boiling point and net weight.
• On the back side: laser engraved electron configuration per shell, Paul-Émile Lecoq de Boisbaudran's name and the year of discovery;
• Main uses: element collection, education, gift and so on.

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