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quartz

Quartz is a relatively well-known gemstone, with many types and quantities in circulation. It is broadly classified into two types: transparent to translucent single crystal and translucent to opaque polycrystal. Single crystal stones include amethyst, citrine, and rose quartz, while polycrystalline stones include chalcedony, agate, and jasper. Many contain other minerals and liquids as inclusions.

Karatz GemMagazine
" quartz "

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パキスタン産オイルインクォーツ 0.535ctルース

Pakistani oil-in quartz 0.535ct loose Sale price¥14,800
Brazilian Dumortierite in Quartz 0.382ct Loose Stone

Brazilian Dumortierite in Quartz 0.382ct Loose Stone Sale price¥9,800
Brazilian Pyrite in Quartz 4.153ct Loose Stone

Brazilian Pyrite in Quartz 4.153ct Loose Stone Sale price¥11,000
Brazilian Pyrite in Quartz 6.992ct Loose Stone

Brazilian Pyrite in Quartz 6.992ct Loose Stone Sale price¥18,800
ブラジル産カイヤナイトインクォーツ 13.740ctルース

Brazilian kyanite in quartz 13.740ct loose Sale price¥29,800
ブラジル産メデューサクォーツ（パライバクォーツ） 10.298ctルース

Brazilian Medusa Quartz (Paraiba Quartz) 10.298ct loose Sale price¥7,980
Brazilian Medusa Quartz (Paraiba Quartz) 5.809ct loose

Brazilian Medusa Quartz (Paraiba Quartz) 5.809ct loose Sale price¥6,980
ブラジル産メデューサクォーツ（パライバクォーツ） 3.441ctルース

Brazilian Medusa Quartz (Paraiba Quartz) 3.441ct loose Sale price¥3,980
ブラジル産メデューサクォーツ（パライバクォーツ） 2.757ctルース

Brazilian Medusa Quartz (Paraiba Quartz) 2.757ct loose Sale price¥3,980
ロッククリスタル 43.123ctルース

[Mr. Takeshi Yamamoto] Rock crystal 43.123ct loose Sale price¥25,800
[12/7 22:00] Brazilian Dumortierite in Quartz 16.250ct Loose Stone

[12/7 22:00] Brazilian Dumortierite in Quartz 16.250ct Loose Stone Sale price¥9,800
[12/9 22:00] Brazilian Lavender Quartz (Scorolite) 0.994ct Loose Stone

[12/9 22:00] Brazilian Lavender Quartz (Scorolite) 0.994ct Loose Stone Sale price¥8,800
Synthetic quartz 0.430ct loose stone (synthetic green quartz)

Synthetic quartz 0.430ct loose stone (synthetic green quartz) Sale price¥6,980
Brazilian Dumortierite in Quartz 1.131ct Loose Stone

Brazilian Dumortierite in Quartz 1.131ct Loose Stone Sale price¥12,800
ブラジル産パライバトルマリンインクォーツ 2.954ctルース

Brazilian Paraiba tourmaline in quartz 2.954ct loose Sale price¥39,800
Brazilian Medusa Quartz (Paraiba Quartz) 3.919ct loose

Brazilian Medusa Quartz (Paraiba Quartz) 3.919ct loose Sale price¥6,980
Brazilian Dumortierite in Quartz 10.0mm/5.357ct Loose Stone

Brazilian Dumortierite in Quartz 10.0mm/5.357ct Loose Stone Sale price¥39,800
Brazilian Amethyst 0.256ct Loose Stone

Brazilian Amethyst 0.256ct Loose Stone Sale price¥8,800
Brazilian rose quartz 4.019ct loose stone

Brazilian rose quartz 4.019ct loose stone Sale price¥11,000
Brazilian rose quartz 1.848ct loose stone

Brazilian rose quartz 1.848ct loose stone Sale price¥9,800
Brazilian Rose Quartz 1.793ct Loose Stone

Brazilian Rose Quartz 1.793ct Loose Stone Sale price¥9,800
Brazilian rose quartz 2.167ct loose stone

Brazilian rose quartz 2.167ct loose stone Sale price¥9,800
ブラジル産ローズアメジスト 0.793ctルース

Brazilian rose amethyst 0.793ct loose stone Sale price¥15,800
デンドリティッククォーツ 7.997ctルース

Dendritic quartz 7.997ct loose Sale price¥6,980
ブラジル産シトリン 0.769ctルース

Brazilian citrine 5.4mm/0.769ct loose stone Sale price¥6,980
ブラジル産シトリン 1.962ctルース

Brazilian citrine 1.962ct loose stone Sale price¥9,800
ブラジル産シトリン 1.659ctルース

Brazilian citrine 1.659ct loose stone Sale price¥9,800
ブラジル産シトリン 1.644ctルース

Brazilian citrine 1.644ct loose stone Sale price¥9,800
ブラジル産エレスチャルアメジスト 1.378ctルース

Brazilian Elestial Amethyst 1.378ct Loose Stone Sale price¥12,800
ブラジル産ブラジル産エレスチャルアメジスト 1.586ctルース

Brazilian Elestial Amethyst 1.586ct Loose Stone Sale price¥8,800
ブラジル産デュモルチェライトインクォーツ 1.414ctルース

Brazilian Dumortierite in Quartz 1.414ct Loose Stone Sale price¥12,800
ブラジル産メデューサクォーツ（パライバクォーツ） 0.614ctルース

Brazilian Medusa Quartz (Paraiba Quartz) 0.614ct Loose Stone Sale price¥9,800
レピドクロサイトインクォーツ 0.692ctルース

Lepidocrocite in quartz 0.692ct loose Sale price¥8,800
カラーシフトアメジスト 0.849ctルース

Brazilian Color-Shifting Amethyst 0.849ct Loose Stone Sale price¥8,800
ブラジル産デュモルチェライトインクォーツ 0.975ctルース（ファセットカット）

[Posted 12547829] Brazilian Dumortierite in Quartz 0.975ct loose Sale price¥9,800
ブラジル産メデューサクォーツ（パライバクォーツ） 1.181ctルース

Brazilian Medusa Quartz (Paraiba Quartz) 1.181ct loose Sale price¥3,980
ブラジル産ラベンダークォーツ（スコロライト） 0.797ctルース

Brazilian Lavender Quartz (Scorolite) 0.797ct Loose Stone Sale price¥7,980
【猫カット】ブラジル産デンドリティッククォーツ 6.775ctルース

[Cat Cut] Brazilian Dendritic Quartz 6.775ct Loose Sale price¥15,800
【ルージュカット】ブラジル産デュモルチェライトインクォーツ 1.184ctルース

[Rouge Cut] Brazilian Dumortierite in Quartz 1.184ct Loose Stone Sale price¥14,800
【ルージュカット】ブラジル産デュモルチェライトインクォーツ 1.493ctルース

[Rouge Cut] Brazilian Dumortierite in Quartz 1.493ct Loose Stone Sale price¥9,800
ティンカーベルクォーツ（ピンクファイヤークォーツ） 1.490ctルース

Brazilian Tinkerbell Quartz (Pink Fire Quartz) 1.490ct Loose (Faceted) Sale price¥35,800
【甲州貴石切子】特大スモーキークォーツ 108.336ctルース《コラボ》ワッペン付

[Koshu Precious Stone Kiriko] Extra large smoky quartz 108.336ct loose "Collaboration" with emblem Sale price¥128,000
ブラジル産エレスチャルアメジスト 0.809ctルース

Brazilian Elestial Amethyst 0.809ct Loose Stone Sale price¥6,980
ブラジル産エレスチャルアメジスト 0.673ctルース

Brazilian Elestial Amethyst 0.673ct Loose Stone Sale price¥9,800
ブラジル産エレスチャルアメジスト 3.093ctルース

Brazilian Elestial Amethyst 3.093ct Loose Stone Sale price¥19,800
ブラジル産デュモルチェライトインクォーツ 1.911ctルース

Brazilian Dumortierite in Quartz 1.911ct Loose Stone Sale price¥8,800
ブラジル産デュモルチェライトインクォーツ 1.451ctルース

Brazilian Dumortierite in Quartz 1.451ct Loose Stone Sale price¥8,800
ブラジル産デュモルチェライトインクォーツ 0.978ctルース

Brazilian Dumortierite in Quartz 0.978ct Loose Stone Sale price¥12,800

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.