Osmio element 76 Os, pure sample 0.5 grams 99.99% in glass vial with label

I got two pieces of osmium and it's very amazing, but i bought 0.5g. On the plastic bag with osmium was written 0,56g, but i and got only 0.47g, what is a little bit not good. One piece weighed 0.33g, and another 0.14g. Maybe my scales are bad, although I weighed all the other metals I received and there were no such situations. But anyway: two small pieces, even if they are lower weight is better for testing than one 0,5g.