Adamant
Adamant is any especially hard substance, whether diamond, other gem or metal. Both adamant and diamond derive from the Greek word adamas, meaning untameable.Since diamond is now used exclusively for the hardest gem, adamant has mostly poetic or figurative use. As an increasingly archaic word, it -- and its adjectival form adamantine -- is especially often seen in fantasy fiction. For instance, in J. R. R. Tolkien's The Lord of the Rings, Galadriel's ring Nenya is also named the "Ring of Adamant". Adamantium is another form found in science fiction and fantasy.
In the book Gulliver's Travels by Jonathan Swift, the bottom of the flying isle of Laputa is made of adamant. The gigantic loadstone in Astronmers' Cave that enables the island to move is also supported by adamant.
Adam Adamant Lives was a BBC television series in the 1960s.
The Adamant Music School is a piano school located in the village of Adamant, Vermont just north of Montpelier. The Adamant Press is also located in the village.
The Adamant was an iron barque (sailing ship) that brought immigrants to New Zealand in the late 19th century.