# Gypsum and Thermal coal

Their prices have moved together.

Source page: https://www.materialinsights.org/links/gypsum-and-thermal-coal/

[Gypsum](https://www.materialinsights.org/commodities/gypsum/) (commodity) and [Thermal coal](https://www.materialinsights.org/energy/thermal_coal/) (energy): 1 relationship.

## How they are linked

### 1. Price link: by-product source

*Cost and price · Weak · Both ways*

Flue gas desulphurisation at coal power plants produces synthetic gypsum, a large share of wallboard feed. The link is about volumes, not coal prices: monthly moves at 0.03, yearly moves at 0.11, rising to 0.27 in the last five years.

- **0.03** monthly change correlation
- **0.11** 12-month change correlation
- **0.28** fitted elasticity

Built from the site data on production routes, energy flows, industry value chains, input-output tables and prices.