Origen of Alexandria[a] (c. 184 – c. 253),[5] also known as Origen Adamantius,[b] was an early Christian scholar,[8] ascetic,[9] and theologian who was born and spent the first half of his career in Alexandria. He was a prolific writer who wrote roughly 2,000 treatises in multiple branches of theology, including textual criticism, biblical exegesis and hermeneutics, homiletics, and spirituality. He was one of the most influential figures in early Christian theology, apologetics, and asceticism.[9][10] He has been described as "the greatest genius the early church ever produced"

https://en.m.wikipedia.org...

Demetrius condemned Origen for insubordination and accused him of having castrated himself (though it has been proposed that this was a result of misunderstanding Origen’s mystical reference to his own celibacy [1]) and of having taught that even Satan would eventually attain salvation, an accusation which Origen vehemently denied

suppose this was 'origen' of the word adamantine?

which i learned in vajrayana practice/retreats,
used a lot re dorje/vajra and buddhas,
symbolizing diamond and thunderbolt