A small coin carries significant information about a nation's history, culture, and economy. For collectors and economic researchers alike, understanding the technical specifications of different denomination coins is essential. This article examines Indian rupee coins, detailing their material composition, weight, diameter, and shape characteristics.

The five rupee coin is one of India's most commonly used coins. Made from a copper-nickel alloy, it offers both corrosion resistance and ductility. Each coin weighs approximately 9.00 grams with a 23 mm diameter, featuring a standard circular shape. These specifications make it easy to carry and recognize in daily transactions.

The two rupee coin has undergone material evolution. Earlier versions used the same copper-nickel alloy, weighing about 6.00 grams with a 26 mm diameter and distinctive eleven-sided shape. This unique design enhanced both recognition and counterfeit prevention. Later versions switched to ferritic stainless steel to reduce production costs, resulting in a slightly reduced weight of 5.62 grams, increased diameter of 27 mm, and a transition to circular shape.

As one of India's smaller denomination coins, the one rupee piece uses ferritic stainless steel construction. Weighing approximately 4.85 grams with a 25 mm diameter, its circular form maintains durability and rust resistance through the steel material.

Also constructed from ferritic stainless steel, the fifty paise coin weighs about 3.79 grams with a 22 mm diameter. As paise represent the fractional currency of rupees (100 paise = 1 rupee), this denomination has seen declining usage due to inflation and economic development.

The twenty-five paise coin shares the ferritic stainless steel material, weighing approximately 2.83 grams with a 19 mm diameter. Like its fifty paise counterpart, this smaller denomination has become increasingly rare in daily commerce.

Among India's smallest denominations, the ten paise coin weighs just 2.00 grams with a 16 mm diameter. Its minimal value has effectively removed it from active circulation.

Indian rupee coin specifications reflect both economic value and monetary policy evolution. The transition from copper-nickel alloys to ferritic stainless steel demonstrates considerations for cost efficiency and durability. Varying dimensions across denominations facilitate practical use and recognition. Understanding these technical parameters provides valuable insight into India's economic and cultural landscape.