---
title: "Czochralski growth: meaning in gemology"
description: "Czochralski growth makes a synthetic crystal from a melt. A seed crystal touches the molten material and is slowly pulled up as the crystal grows."
url: https://digitalgemology.com/learn/glossary/czochralski-growth
image: https://digitalgemology.com/img/og-digital-gemology.png?v=d224fb01
---

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[Glossary](https://digitalgemology.com/learn/glossary) · Treatments and origin

# Czochralski growth

Also called crystal pulling, pulled synthetic

Czochralski growth makes a synthetic crystal from a melt. A seed crystal touches the molten material and is slowly pulled up as the crystal grows.

## In more detail

The method dates from the early 1900s. It is used for synthetic alexandrite, chrysoberyl, corundum and garnet. Like flame fusion, it grows crystals from a melt.

## On a grading report

Labs report the stone as laboratory-grown (synthetic).

## Related terms

- [Synthetic gemstone](https://digitalgemology.com/learn/glossary/synthetic-gemstone): A synthetic gemstone is made in a laboratory and has essentially the same chemistry and properties as the natural gem. A synthetic ruby is ruby, made by people.
- [Flame fusion](https://digitalgemology.com/learn/glossary/flame-fusion): Flame fusion grows synthetic crystals by dropping fine powder through a very hot flame. The melted drops build up a crystal on a pedestal below.
- [Flux growth](https://digitalgemology.com/learn/glossary/flux-growth): Flux growth is a way to grow synthetic crystals from a chemical solvent (flux). Crystals form as the hot solution slowly cools.
- [Corundum](https://digitalgemology.com/learn/glossary/corundum): Corundum is the mineral species made only of aluminum and oxygen. Its red variety is ruby, and all its other colors are sapphire.

[All 328 terms](https://digitalgemology.com/learn/glossary)