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It's this ease of use and clean approach to laser cutting and engraving that ensures the Glowforge makes it to No.1 on my list. It does, however, ideally need to be used with the Glowforge Air Filter accessory. (The Plus and Basic use a 40 watt, Class 1 laser, which is still more powerful than most on this list.) In my Glowforge Pro review this laser cutter impressed with its speed, ease of use and an excellent design app. Pentagonal Bipyramid vs.The Glowforge Pro uses a high-spec Class 4, 45 watt laser which is the most powerful you can get outside of an industrial use.A hitherto unrecognized 2-periodic net derived from a circle packing.The Fascination of Crystals and Symmetry.Search for: Follow me on Twitter My Tweets Links High-Resolution Space Group Diagrams and Tables.Smart Mineralogist (Details on the composition, physical, optical, crystallograpic and classification data on 5,000+ minerals).(Itegrated database of Raman spectra, X-ray diffraction and chemistry data for minerals).AMCSD (American Mineralogist Crystal Structure Database).3dt (Java) – for the visulaization of 3D tilings of nets – Freeware.Systre (Java) – analyses nets and creates high-symmetry embeddings – Freeware.ToposPro (Win) – Registratration required, Subset of topological collections are freely available.Programs for the analysis and visualization of nets: Quiztallography (smart phone quizz app for Android and Windows Phone).32 interactive 3D PDFs for the 32 crystal classes, free to download (display only).WinXMorph TM (Win) – Freeware, Donation welcome.KrystalShaper (Win) – Commercial, 50 $, now Freeware.JCrystal (Java) – Commercial, 50 $, now Freeware.Programs that are able to create/display form data of outer shapes of crystals: Diamond 4 (Win) – Commercial, 299 € (Personal perpetual license).CrystalMaker® X (Mac, Win) – Commercial, 499 $ (Educational).ChemCraft (Win, Linux) – Commercial, 8-year subscription 160 $.The crystal creator costs 9.99 €/month for academics Linux, Mac) – Some elements are free, others are available on a monthly/yearly subscription basis.