Let's see what the actual journal article says.
http://www.sciencemag.org/content/337/6096/825.abstract?sid=...
Long-Range Ordered Carbon Clusters: A Crystalline Material with Amorphous Building Blocks
Lin Wang, Bingbing Liu, Hui Li, Wenge Yang, Yang Ding, Stanislav V. Sinogeikin, Yue Meng, Zhenxian Liu, Xiao Cheng Zeng, and Wendy L. Mao
Science 17 August 2012: 337 (6096), 825-828. [DOI:10.1126/science.1220522]
The Science editors also solicited a commentary
http://www.sciencemag.org/content/337/6096/812.summary
on the article.
AFTER EDIT:
As I read through the full-text article, it seems that the kind of nanoscale observations being reported in the article might be consistent with the "new" material simply being local, small-scale diamonds (the substrate material was carbon molecules, after all, before they were subjected to high pressure), being "as incompressible as diamond," as reported, for the unremarkable reason that it is diamond. But I will defer to someone who is more knowledgeable than I in materials science to see what other interpretation of the published article might make more sense.
http://www.sciencemag.org/content/337/6096/825.abstract?sid=...
Long-Range Ordered Carbon Clusters: A Crystalline Material with Amorphous Building Blocks Lin Wang, Bingbing Liu, Hui Li, Wenge Yang, Yang Ding, Stanislav V. Sinogeikin, Yue Meng, Zhenxian Liu, Xiao Cheng Zeng, and Wendy L. Mao Science 17 August 2012: 337 (6096), 825-828. [DOI:10.1126/science.1220522]
The Science editors also solicited a commentary
http://www.sciencemag.org/content/337/6096/812.summary
on the article.
AFTER EDIT:
As I read through the full-text article, it seems that the kind of nanoscale observations being reported in the article might be consistent with the "new" material simply being local, small-scale diamonds (the substrate material was carbon molecules, after all, before they were subjected to high pressure), being "as incompressible as diamond," as reported, for the unremarkable reason that it is diamond. But I will defer to someone who is more knowledgeable than I in materials science to see what other interpretation of the published article might make more sense.