# Inverse Opal

Pyanodons item · internal name `inverse-opal` · stack size 100 · first craftable in tier 7 (Production science pack, [tier 7](https://factorio.kalzumeus.com/tier/7.md))
HTML page: https://factorio.kalzumeus.com/item/inverse-opal/

## Produced by (2 recipes)

### Inverse Opal (`inverse-opal`)

- 20 s · tier 7 · productivity modules allowed
- Ingredients: 5 × [Biopolymer](https://factorio.kalzumeus.com/item/biopolymer.md), 2 × [Colloidal silica](https://factorio.kalzumeus.com/item/colloidal-silica.md), 1 × [Hardener](https://factorio.kalzumeus.com/item/hardener.md), 1 × [YAG laser module](https://factorio.kalzumeus.com/item/yag-laser-module.md), 100 × [Hydrogen chloride](https://factorio.kalzumeus.com/fluid/hydrogen-chloride.md)
- Results: 1 × [Inverse Opal](https://factorio.kalzumeus.com/item/inverse-opal.md), 0.9 × [YAG laser module](https://factorio.kalzumeus.com/item/yag-laser-module.md) (90% chance)
- Made in: Research center MK 01, Research center MK 02, Research center MK 03, Research center MK 04
- Unlocked by: [Photonics](https://factorio.kalzumeus.com/tech/photonics.md)

### Inverse Opal (`dimensional-gastricorg-to-inverse-opal`)

- 90 s · tier ?
- Ingredients: 1 × [Dimensional gastricorg](https://factorio.kalzumeus.com/item/dimensional-gastricorg.md)
- Results: 100 × [Inverse Opal](https://factorio.kalzumeus.com/item/inverse-opal.md)
- Made in: Atomizer MK 01, Atomizer MK 02, Atomizer MK 03, Atomizer MK 04
- Unlocked by an upgrade choice (script), not research

## Used in (1 recipes)

- Photonic Crystal (`photonic-crystal`, tier 7) → [Photonic Crystal](https://factorio.kalzumeus.com/item/photonic-crystal.md)