Very scarce in all grades, R4.2.
The 1900 Indian Cent has the highest mintage from the years 1859 to 1900. Therefore, the 1900 Indian Cent is very common in circulated grades. In Mint State condition it becomes scarce at about MS64 condition. However, there are probably still thousands of examples grading MS64 condition or higher. In MS65 they are much scarcer with possibly several hundred examples known. In MS66 condition or higher they are very hard to find with possibly no more than about 150 examples surviving. In MS67 condition it is almost rare with a few dozen examples verified. Anything grading higher is rare if any even exist.