Another succulent found in a greenhouse without a tag in the Gobi desert, though likely originating elsewhere in the world.
And with Bamboo's ID, I found an example online of this plant flowering.
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It is Fenestraria aurantiaca, commonly known as Baby Toes - they sometimes have quite pinkish tinges round the edges. Native to South Africa https://shopaltmanplants.com/products/fenestraria-aurantiaca-baby-toes.
Correctly identified above. They flower (in North America) fairly profusely in late winter/spring. They flower over a period of weeks. They need a fair amount of water and plenty of sun. They spread pretty quickly for a succulent. I've had a few and enjoyed them. There are pink, white and yellow flowered variants.