Dolerite vs Granite | Could Ancient Egyptians carve obelisks?

What does it take to work granite with a stone hammer? Let’s experiment! We have tried working granite with dolerite hammers, just like those used by the Ancient Egyptians - watch the video to see the result!
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Experiment location and date: outer Moscow, 5 October 2019
Team:
- Oleg Krugliakov rekhmire.ru
- Nikolay Vasiutin
- ‪@Senmuth‬
- Pavel Selivanov
- Alexander Sokolov
- Valeriy Mikhailov
Specific weight of granites - around 2,700 kg/m3
Specific weight of basalts, dolerites, gabbro-dolerites - around 3000 kg/m3
Small dolerite hammer efficiency working granite:
600 g/hr =222 cm3/hr
Dolerite rambling from small hammer:
249 g/hr =83 cm3/hr
Large dolerite hammer efficiency working granite:
840 g/hr = 311 cm3/hr
Dolerite rambling from large hammer:
229 g/hr = 73 cm3/hr
Filmed by Aleksander Zakharchenko
Edited by Kseniya Ablez
English voiceover: Dmitry Oliferovich
English translation: Maria Protopopova
Music by Spring Thaw - Asher Fulero, Belief - Silent Partner
We would like to thank Valeriy Mikhailov for his hospitality
Sources and extras:
Oleg Krugliakov’s article on the experiment:
@chtomoglidrevnie-drob...
Oleg Krugliakov’s article ‘Crushing Dolerite’
@chtomoglidrevnie-drob...
"Digging Up at the Bottom of the Nile" documentary
• Video
Crushing granite with granite (experiment):
• Как древние египтяне д...
Our visit to the Aswan quarries:
• Асуанский обелиск: нез...
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