On CNBC's "Mad Money Lightning Round," Jim Cramer said Nvidia Corp (NASDAQ:NVDA) is a "terrific company, but it sells at a very high price-to-earnings multiple."

Analysts are overwhelmingly bullish on Nvidia, giving the stock a consensus Buy rating.

Cramer said he doesn't know about Blackstone Minerals Ltd (OTC:BLSTF) and needs to do some more work on it.

When asked about EVgo Inc (NASDAQ:EVGO), he said, "Our biggest fear is, again, losing money, and it does not fit our criteria anymore for what we're recommending."

Energy Transfer LP (NYSE:ET) is a very good stock, Cramer said. "Times change and it's become a better, better stock."

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When asked about Axcelis Technologies Inc (NASDAQ:ACLS), he said, "Some of these companies in this business are doing amazingly well. And you've got to hand it to them."

The "Mad Money" host said he needs to do some more work on Algonquin Power & Utilities Corp (NASDAQ:AQN).

When asked about Medical Properties Trust Inc (NYSE:MPW), he said, "This one, I don't like that particular part of the real estate investment trusts. I think that they are too high-yielding, which therefore causes me to be concerned that they will not be able to make the distribution."

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