Carbon, the mostly common element in the realm of organic chemistry is a magic element as life depends on it . However, as such Carbon is also present in the solid state world with different dimensionalities (D), ranging from Buckminsterfullerenes (0D), to Nanotubes (1D), and then to Graphite (2D) and Diamond (3D) (cf. and therein cited works). Dimensionality is related to the hybridization of carbon valence states (C: {He}2s 2 , 2p 2 ), namely sp in linear forms, trigonal sp 2 in Graphite, and tetrahedral sp 3 in Diamond. Such quantum mixing nomenclatures, proper to molecular chemistry, highlight interconnectedness between the molecular and solid state domains. Recently we have shown that the rarely occurring tricarbon C 3 molecule can be the building block of 3D covalent ultra-hard networks, with carbon showing two hybridization types: linear-like and tetrahedral-like .