Kiran Reddy Kiran Reddy Asked 7 months ago

Can kidney stones be black in color?

My friend passed a small stone last week, and she described it as very dark, almost black. Is it common for kidney stones to be black in color, or is that quite unusual?

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6 answers

Vikram Saxena Vikram Saxena Joined May 2026 5 months ago
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Yes, they can be dark brown or black, usually due to calcium oxalate buildup. Having high BP means keeping a close eye on kidney health is extra important for me, so I highly recommend getting regular clinical checkups.

Shalini Nair Shalini Nair Joined Feb 2026 7 months ago

Yes, kidney stones can definitely be black. If you have passed one or suspect you have them, don't waste time researching colors. Book a quick lab test for stone analysis and consult a urologist this weekend.

Pooja Sharma Pooja Sharma Joined Jan 2026 7 months ago

Actually, my dad passed a small stone that was almost completely black and looked like a tiny piece of coal. The doctor said it's very common for calcium oxalate stones. Keep yourself well hydrated and show it to a doctor.

Amit Patel Amit Patel Joined Jan 2026 7 months ago

I didn't know kidney stones could be black, I thought they were always white or yellow. If someone passes a black stone, does it mean it's more dangerous or harder to treat? Sorry, I am just trying to understand this.

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Consult a neurologist

Sanjay Verma Sanjay Verma Joined Jun 2026 4 months ago

Haan, black ya dark brown stones ho sakte hain, isme koi badi baat nahi hai. Par agar urine pass karne mein pain ya blood aa raha hai, toh ghar pe mat baitho. Seedha urologist ke paas jao.

Gurcharan Singh Gurcharan Singh Joined May 2026 5 months ago

Yes, beta, they can be dark or black. While traditional advice says to drink plenty of barley water to flush things out, a black stone can be very sharp. Please let a proper doctor check it to prevent any internal injury.

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