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 "

Brazilian citrine 1.659ct loose stone Sale price¥9,800

Brazilian citrine 1.644ct loose stone Sale price¥9,800

Brazilian Elestial Amethyst 1.378ct Loose Stone Sale price¥12,800

Brazilian Elestial Amethyst 1.586ct Loose Stone Sale price¥8,800

Brazilian Dumortierite in Quartz 1.414ct Loose Stone Sale price¥12,800

Brazilian Medusa Quartz (Paraiba Quartz) 0.614ct Loose Stone Sale price¥9,800

Brazilian Kasharai Amethyst 5.6mm/0.460ct Loose Stone Sale price¥8,800

Brazilian Kasharai Amethyst 0.314ct Loose Stone Sale price¥9,800

Goethite in Amethyst 0.806ct loose stone Sale price¥4,980

Lepidocrocite in quartz 1.555ct loose Sale price¥12,800

Lepidocrocite in Quartz 1.227ct Loose Stone Sale price¥9,800

Lepidocrocite in quartz 0.692ct loose Sale price¥8,800

Rose quartz 18.410ct loose (pineapple cut) Sale price¥5,980

Green quartz 10.330ct loose (pineapple cut) Sale price¥4,980

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

Brazilian Medusa Quartz (Paraiba Quartz) 1.181ct loose Sale price¥3,980

Brazilian Lavender Quartz (Scorolite) 0.797ct Loose Stone Sale price¥7,980

[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

Brazilian Tinkerbell Quartz (Pink Fire Quartz) 1.490ct Loose (Faceted) Sale price¥35,800

【ダンデライオンカット】スモーキークォーツ 25mm/41.745ct《コラボ》ルース（6枚花びら）ワッペン付

[Dandelion Cut] Smoky Quartz 25mm/41.745ct《Collaboration》Loose (6 petals) with patch Sale price¥98,000

【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

[Koshu Precious Stone Kiriko] Strawberry Quartz 10.023ct Loose with Patch Sale price¥69,800

Brazilian Elestial Amethyst 0.809ct Loose Stone Sale price¥6,980

Brazilian Elestial Amethyst 0.673ct Loose Stone Sale price¥9,800

Brazilian Elestial Amethyst 0.482ct Loose Stone Sale price¥4,980

Brazilian Elestial Amethyst 0.724ct Loose Stone Sale price¥6,980

Brazilian Elestial Amethyst 3.093ct Loose Stone Sale price¥19,800

Brazilian Dumortierite in Quartz 1.911ct Loose Stone Sale price¥8,800

Brazilian Dumortierite in Quartz 1.451ct Loose Stone Sale price¥8,800

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

Goethite in quartz 1.020ct loose Sale price¥2,980

Brazilian Tinkerbell Quartz (Pink Fire Quartz) 4.156ct Loose Stone Sale price¥18,800

Madeira Citrine 6mm/0.914ct loose Sale price¥8,800

【甲州貴石切子plusthree】グリーンクォーツ 6mm/0.731ct ルースワッペン付

[Koshu Precious Stone Kiriko PlusThree] Green Quartz 6mm/0.731ct Loose with Patch Sale price¥18,800

【甲州貴石切子plusthree】グリーンクォーツ 6mm/0.737ctルースワッペン付

[Koshu precious stone Kiriko plusthree] Green quartz 6mm/0.737ct loose with patch Sale price¥18,800

Brazilian Madeira Citrine 6.8mm/1.150ct Loose Stone Sale price¥4,980

[Takeshi Yamamoto] Brazilian Rock Crystal 12.725ct Loose Sale price¥39,800

Brazilian chlorite in quartz 27.725ct loose stone Sale price¥19,800

Brazilian Dumortierite in Quartz 3.188ct loose stone (faceted cut) Sale price¥12,800

Brazilian Dumortierite in Quartz 1.284ct loose stone (faceted cut) Sale price¥9,800

Brazilian Lepidocrocite in Quartz 9.0mm/2.735ct Loose Stone Sale price¥14,800

Brazilian rutilated quartz (rutilated quartz) 7.741ct loose stone Sale price¥15,800

Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.794ct Loose Stone Sale price¥15,800

[Takeshi Yamamoto] Bicolor Smoky Quartz 10.674ct Loose Stone Sale price¥39,800

[Takeshi Yamamoto] Brazilian Rock Crystal 22mm/48.216ct Loose Stone (Fire Flower) Sale price¥59,800

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.