Hi @anil12687,
Thank you for your question about repairing cracks in a stone kitchen benchtop.
Also, welcome to the Bunnings Workshop community, it is fantastic to have you with us.
It would be helpful if you could upload some photos of the cracked benchtop as there are different products for different issues and it would be hard to point you to one specific thing without seeing the issue.
Stone counters are often repaired using an epoxy such as Loctite 14ml Self Mixing Epoxy which can be tinted to match; however, it is hard to say whether this would be effective without seeing it.
Let me know if you need some assistance with uploading images, I'd be more than happy to help.
Jacob
