
doi: 10.1038/189050a0
THE rare ‘ballas’ form of natural diamond is referred to occasionally in the literature. Ballas diamonds have been described by various authors as follows : (1) “Dense, globular aggregates of small, radially disposed diamond crystals”1 ; (2) “… a very hard, tough, globular mass of diamond crystals radiating from a common center”2; (3) “… a rare form of natural diamond with radial symmetry composed of apparently spherically grown layers …”3; (4) “Radial stalk-like formation of diamond crystals, or irregular growths of multiple crystals”4.
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 9 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Top 10% | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
