The large Kingdoms of Isekai agreed upon a standard trade for the value of metals. This allowed each area to mint its own coins with images and historical icons, but still have them be useful during trade and travels to far-off lands. Currency functions off value according to weight and the scarcity of the metal. Because of this, every coin, regardless of origin or metal, is always created to be half of an ounce, so that 32 coins will always equate to a pound.
These relationships are widely accepted and used throughout most civilized areas in Isekai as a standard for trading metals, though some metals may be prized above others for their value as components. Enchanted metals or naturally occurring elemental and magical ores are also judged by this standard, but they are not turned into coins because their value is explicitly functional. Their equivalent value in relation to Gold is listed below because it is considered the most standard currency for precious items.
| 1 Pound of Putrid Steel | 5 Pounds of Gold |
| 1 Pound of Sickly Steel | 5 Pounds of Gold |
| 1 Pound of Flare Steel | 10 Pounds of Gold |
| 1 Pound of Zap Steel | 10 Pounds of Gold |
| 1 Pound of Frost Steel | 10 Pounds of Gold |
| 1 Pound of Hush Steel | 10 Pounds of Gold |
| 1 Pound of Boom Steel | 10 Pounds of Gold |
| 1 Pound of Sun Steel | 100 Pounds of Gold |
| 1 Pound of Moon Steel | 100 Pounds of Gold |
| 1 Pound of Black Steel | 100 Pounds of Gold |
| 1 Pound of Arcane Steel | 200 Pounds of Gold |
Coin value is determined by weight accordingly:
| 32 Copper Pieces | 1 Pound of Copper |
| 32 Silver Pieces | 1 Pound of Silver |
| 32 Gold Pieces | 1 Pound of Gold |
| 32 Platinum Pieces | 1 Pound of Platinum |
| 32 Mithril Pieces | 1 Pound of Mithril |
| 32 Adamantite Pieces | 1 Pound of Adamantite |
These metals have relative value to each other when exchanging currency:
| 10 Copper | 1 Silver |
| 10 Silver | 1 Gold |
| 10 Gold | 1 Platinum |
| 10 Platinum | 1 Mithril |
| 10 Mithril | 1 Adamantite |
Properties
Physical Characteristics
Below is a catalog of the special metals found throughout Isekai and knowledge about their uses and handling.Putrid Steel
Sickly Steel
Flare Steel
Zap Steel
Frost Steel
Hush Steel
Boom Steel
Boom Steel
Boom Steel
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Image via Midjourney, created by Riverfang
Boom Steel is an extremely volatile material and is often mistaken for gold due to its color and physical appearance. It is the lightest metal in the world but must be handled carefully as even a light strike will release a thunderous crash that can injure and deafen all in range.
Sun Steel
Moon Steel
Black Steel
Black Steel
Black Steel
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Image via Midjourney, created by Riverfang
Black Steel is a unique metal that is known for its ties to nefarious uses and is often mistaken for obsidian due to its glossy black appearance. This metal can rot all organics and cause lasting damage to those that touch it.

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