vanskeligere enn diamant mais duros que o diamante one of the hardest substances known to man strongest material found in nature 比金剛石難 elmastan daha sert 다이아몬드보다 더 열심히 there are harder oddities that have never been synthesized kovempi kuin timantti harder than diamond khó hơn so với kim cương سخت تر از الماس Lonsdaleite harder as diamant 58 percent harder ダイヤモンドよりも硬いです أصعب من الماس mais duro do que o diamante härter als Diamant harder dan diamant that is 18% harder than diamond