The hardest substance available on earth is?

Question

A. Platinum

B. Diamond

C. Quartz

D. Gold

Afdaleddin Ali Eid Saou · Answer

the hardest naturally occurring substance found on Earth is Diamond

Mohammad Mustahsan Rizvi · Answer

The hardest substance is b. Diamond

VISHAK J · Answer

B.Diamond (Alloropes of carbon)

Tariq abbas · Answer

the diamond is the hardest

B. Dimond

Muhammad Arif SYAHRIJAL · Answer

It is Diamond, Please refer to Moh's scale in General Geology

gaurav jaiswal · Answer

B Diamond

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مستخدم محذوف‎ · Answer

The hardest substance available on earth is option B. Diamond

Rana Muhammad Adnan Akbar · Answer

C. Quartz is my guess on this question

Saif Abdulrahman · Answer

Noman Hafeez · Answer

Diamond is hardest substance on earth.

Mohamed Wassim Hamrouni · Answer

The hardest substance on earth is diamond (10 on the Mohs scale)