Scientists Against Myths | Dolerite vs Granite | Could Ancient Egyptians carve obelisks? @ScientistsAgainstMyths | Uploaded May 2021 | Updated October 2024, 3 hours ago.
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:
vk.com/@chtomoglidrevnie-drobit-dolerit-2
Oleg Krugliakov’s article ‘Crushing Dolerite’
vk.com/@chtomoglidrevnie-drobit-dolerit
"Digging Up at the Bottom of the Nile" documentary
youtube.com/watch?v=TDfAct0ARmY
Crushing granite with granite (experiment):
youtu.be/SOlc25RTF4Y
Our visit to the Aswan quarries:
youtu.be/lU0QSkGOdKw

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Contact: g_souris@mail.ru
Skype: ya-kudzo
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