So that you can plan accordingly, Hampton Research will be closed Monday, May 31, 2021 and will reopen June 1, 2021. All orders received after Friday, May 28, 2021 4:oo PM (Pacific Standard Time) will be processed Tuesday, June 1, 2021. Each and every one of us at Hampton Research appreciates your using Hampton Research crystallization research tools. As always, best of success with your crystals!