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For non-profit users, an invoice is issued upon delivery of the the results, and payment is required withing 30 days.For Canadian commercial users, and non-Canadian users, payment is required prior to releasing results.

"Canadian Non-profit" is defined as Canadian academic institution, Canadian Government agency, Regsitered Canadian non-profit organization, or Canadian Indigenous Group.A wide range of sample types can be submitted for dating.We can advise on the suitability of different materials and the most effective pretreatments.However, if the bone was heated under reducing conditions, it (and associated organic matter) may have been carbonized. Shells from both marine and land organisms consist almost entirely of calcium carbonate, either as aragonite or as calcite, or some mixture of the two.Calcium carbonate is very susceptible to dissolving and recrystallizing; the recrystallized material will contain carbon from the sample's environment, which may be of geological origin.It is also possible to test conchiolin, which is an organic protein found in shell, but this only constitutes 1-2% of shell material. Libby's first measurements were made with lamp black, The steps to convert the sample to the appropriate form for testing can be long and complex.

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