I know, that it´s almost impossible to find out exactly what it is, if you by plants without a name.
But I think, this plant has some characteristic features, which make a diagnosis of at least the species possible, I hope.
The plant is truncated, has medium size islands and about 1 mm broad regularly channels. In the channels there are rubrications visible, not concentrated in the margins.
It might be a Lithops hallii, I think. In some aspects, i.e. the color, it reminds me to 'Green Soapstone'.
But it is different to all the cultivars, I know.
Does anyone have a 'Fullergreen', which looks similar?
Viele herzliche Grüße aus Berlin,