I’d say it is but it’s hard to tell from the rough endgrain. Also do consider cumaru which is also used in flooring and is also called Brazilian walnut.
And leaves really tiny splinters that fester. But...it's a durable wood!!All I know is it is hard, really hard.
Maybe all the cumaru I have seen is stained (flooring) but yours looks a lot lighter than usual. (I’m not doubting it’s cumaru, I’m just wondering if that piece is representative of the whole species)Looks like Ipê but from these pictures I can't say 100% confident.
Cumaru is a clear wood...called in Brazil Ipê Champanhe
I have both here at home
Ipê
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End grain
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Cumaru at left
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End grain
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Other piece
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Thanks for comment...this is the reason I add scientific name...I don't have any doubt my pieces are real Cumaru...At book picture you can read:Cumaru verdadeiro=Real Cumaru...Cumaru Amarelo=Yellow Cumaru...and Champanhe (because is clear as champagne) instead a brown color at real Ipe (for decks and flooring).Maybe all the cumaru I have seen is stained (flooring) but yours looks a lot lighter than usual. (I’m not doubting it’s cumaru, I’m just wondering if that piece is representative of the whole species)