A Piece of the True Cross Lost?

So, the most interesting piece of news I saw regarding the sinking of the MOSKVA was that there may have been a piece of the True Cross on board and, if so, presumably now lost in the Black Sea:

So unlikely was the loss of the ship in Moscow’s eyes that in 2020 Orthodox Christian officials said it had been designated to carry a piece of the “true cross,” a relic from the wooden cross on which Jesus Christ is said to have been crucified.

Here's the link for those wanting more context:

https://www.theguardian.com/world/2022/apr/15/loss-of-moskva-strikes-serious-blow-to-russian-militarys-prestige

--John R.

--who has seen one such fragment*

* but who, when it comes to relics, wd rather have had the chance to see an angel's feather.