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oil in quartz

As the name suggests, oil-in-quartz is a gemstone with oil inside the quartz. The color of the oil is often neon yellow, but there are also colorless ones. This oil is actually petroleum, and when exposed to a black light, it fluoresces neon blue. Some of them have moving bubbles.

Karatz GemMagazine
" Oil in Quartz "

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Sold out 1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》
Sold out Pakistani Oil in Quartz 0.235ct Loose Stone
Sold out パキスタン産オイルインクォーツ 0.629ct原石(双子・気泡が動くタイプ)
Sold out 【桔梗カット】オイルインクォーツ 4.010ctルース - カラッツSTORE
Sold out 【桔梗カット】オイルインクォーツ 20.940ctルース(虹入) - カラッツSTORE
Sold out パキスタン産オイルインクォーツ 0.427ctルース

KARATZ Custom Made

Why not take your favorite gemstone that you found at KARATZ and have it made into custom-made jewelry? It will be made by skilled Japanese craftsmen.
We carefully craft each piece of jewelry, starting with the stone setting, to match the individual characteristics of the gemstone.

KARATZ・Five Commitments

So that more people can feel closer to jewellery and enjoy it easily.
We will introduce KARATZ's thoughts on products, the attention to detail and efforts in selecting gemstones and creating jewelry.

KARATZ's Initiatives and Social Contributions

We will introduce KARATZ's efforts, including nurturing the next generation and business collaboration to develop the industry, and supporting children in Sri Lanka, the land of jewels.

KARATZ Books

These are books that KARATZ has been involved in writing, supervising, and planning. They are all books that allow you to enjoy gemstones from various angles. You can also purchase them directly.

jeweler's tools

For those who want to enjoy jewelry more but don't know what tools to use, we will introduce tools that are also used by KARATZ staff. You can also purchase them directly.