Turning to 'metaglitter', two projections with different orientations are provided. In Fig. the projection along the c-axis shows that both C1 and C2 exhibit similar tetrahedral-like charge density. However, C2 atoms now form perfect squares, and the hybridization is close (but not quite) to tetrahedral as shown in Fig. with a projection along the a-axis. Such behavior, with the equal C-C distances justifies the appellation of meta-(beyond) glitter, allowing the expectation of higher hardness for the two other 'glitter' allotropes, and closer to diamond, as will be shown below.