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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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ブラジル産ブラジル産ブルートルマリンインクォーツ 10.466ctルース

[On sale July 5th, 10 PM JST] Brazilian Blue Tourmaline in Quartz 10.466ct Loose Stone Sale price¥39,800
ブラジル産ブラジル産ブルートルマリンインクォーツ 4.241ctルース

[On Sale July 6, 10 PM] Brazilian Blue Tourmaline in Quartz 4.241ct Loose Stone Sale price¥19,800
ブラジル産ブラックガーデンクォーツ 5.030ctルース

[On sale July 9th at 10 PM JST] Brazilian Black Garden Quartz Loose Stone 5.030ct Sale price¥12,800
ブラジル産ティンカーベルクォーツ（ピンクファイヤークォーツ） 4.823ctルース

Pink Fire Quartz (Tinkerbell Quartz) from Brazil, 11mm/4.823ct loose stone Sale price¥25,800
ブラジル産デュモルチェライトインクォーツ 1.729ctルース

[On sale July 24 at 10 PM JST] Brazilian Dumortierite in Quartz 7.3mm/1.729ct Loose Stone Sale price¥12,800
ブラジル産ルチルレイテッドクォーツ 1.482ctルース

Brazilian rutilated quartz (rutilated quartz) 8.1mm/1.482ct loose stone Sale price¥8,800
ブラジル産ルチルレイテッドクォーツ 2.090ctルース

Brazilian rutilated quartz (rutilated quartz) 8.2mm/2.090ct loose stone Sale price¥8,800
アメリカ産ハーキマーダイヤモンド 0.528ctルース

American Herkimer Diamond (Rock Crystal) 5.5mm/0.528ct Loose Sale price¥8,800
Brazilian Amethyst 9.749ct Loose Stone

Brazilian Amethyst 9.749ct Loose Stone Sale price¥12,800
オイルインクォーツ 0.438ctルース

Pakistani Oil in Quartz 0.438ct Loose Stone Sale price¥6,980
メデューサクォーツ（パライバクォーツ） 0.479ctルース

[Sale Date: June 26th, 10 PM JST] Brazilian Medusa Quartz (Paraiba Quartz) 5.4mm/0.479ct Loose Stone (Rose Cut) Sale price¥12,800
[On sale June 21st at 10 PM] [Limited to 1 set] Amethyst & Citrine Symmetrical Pair Cut Set 66.58ct Loose Gemstones [Multiple Purchase Discount Available]

[On sale June 21st at 10 PM] [Limited to 1 set] Amethyst & Citrine Symmetrical Pair Cut Set 66.58ct Loose Gemstones [Multiple Purchase Discount Available] Sale price¥29,800
雲母インクォーツ 0.758ctルース

Mica in Quartz 0.758ct Loose Stone Sale price¥5,980
デンドリティッククォーツ 4.587ctルース

Brazilian dendritic quartz 4.587ct loose stone Sale price¥9,800
Lepidocrocite in quartz 0.770ct loose

Lepidocrocite in quartz 0.770ct loose Sale price¥6,980
レピドクロサイトインクォーツ 0.532ctルース

Lepidocrocite in quartz 0.532ct loose Sale price¥6,980
ブラジル産マーカサイトインクォーツ 6.670ctルース

[Sales start May 31, 10 PM JST] Brazilian Marcasite in Quartz Loose Stone 6.670ct Sale price¥25,800
アメジスト 4.249ct原石

Amethyst 4.249ct rough stone Sale price¥4,980
ブラジル産クォーツインクォーツ 15.373ctルース

Brazilian Quartz in Quartz 15.373ct Loose Stone Sale price¥18,800
Sold out ロマネサイトインクォーツ 4.825ctルース

Romanesite in Quartz 4.825ct loose stone

ブラジル産フラワークォーツ 7.064ctルース

Brazilian Flower Quartz 7.064ct Loose Stone Sale price¥14,800
ブラジル産ロマネサイトインアメジスト 7.083ctルース

Brazilian Romanesite in Amethyst 7.083ct Loose Stone Sale price¥15,800
ブラジル産フラワークォーツ 4.666ctルース

Brazilian Flower Quartz 4.666ct Loose Stone Sale price¥9,800
デュモルチェライトインクォーツ 0.432ctルース

Brazilian Dumortierite in Quartz 0.432ct Loose Stone Sale price¥6,980
K18 クォーツァイト ペンダントトップ（ネックレストップ）

【Calafuri】K18 Quartzite Pendant Top (Necklace Top) Sale price¥49,800
ブラジル産カラーシフトアメジスト 1.865ctルース

[On sale May 24th, 10 PM JST] Brazilian Color-Shift Amethyst 1.865ct Loose Gemstone Sale price¥9,800
ブラジル産ラベンダークォーツ（スコロライト） 2.211ctルース

[On sale May 21st at 10 PM] Brazilian Lavender Quartz (Scorolite) 2.211ct Loose Stone Sale price¥12,800
ブラジル産ラベンダークォーツ（スコロライト） 0.952ctルース

[On Sale May 21st, 10 PM] Brazilian Lavender Quartz (Scorolite) 0.952ct Loose Stone Sale price¥9,800
ブラジル産カラーシフトアメジスト 6.559ctルース

【Sold from 22:00 on May 21】Brazilian Color-Shift Amethyst 6.559ct Loose Stone Sale price¥15,800
ブラジル産ローズアメジスト 6.325ctルース

[Sale starts May 21st, 10 PM JST] Brazilian Rose Amethyst 6.325ct Loose Gemstone Sale price¥12,800
[On sale May 10th at 10 PM] "Limited 11 Stones" Brazilian Mica in Rose Quartz (1 stone) "Multiple purchase discount available"

[On sale May 10th at 10 PM] "Limited 11 Stones" Brazilian Mica in Rose Quartz (1 stone) "Multiple purchase discount available" Sale price¥3,980
雲母インクォーツ 0.865ctルース

Mica in Quartz 0.865ct Loose Stone Sale price¥5,980
雲母インクォーツ 0.736ctルース

Mica in Quartz 0.736ct loose stone Sale price¥5,980
10ctルース

Mica in Quartz 0.710ct Loose Sale price¥5,980
【22602562掲載】K18 アメジスト リング

[On sale May 2nd at 10 PM] K18 Amethyst Chain Ring Sale price¥18,800
ブラジル産マイカインローズクォーツ（雲母インローズクォーツ） 4.040ctルース

[Sale at 10 PM on May 18th] Brazilian Mica In Rose Quartz (Muscovite In Rose Quartz) 4.040ct Loose Stone Sale price¥5,980
ブラジル産マイカインローズクォーツ（雲母インローズクォーツ） 7.882ctルース

[On sale May 6th at 10 PM] Brazilian Mica In Rose Quartz (Mica in Rose Quartz) 7.882ct Loose Stone Sale price¥9,800
【12562772掲載】ブラジル産マイカインローズクォーツ（雲母インローズクォーツ） 7.044ctルース

Brazilian Mica-in-Rose Quartz (Mica-included Rose Quartz) 7.044ct Loose Gemstone Sale price¥8,800
Brazilian Mica in Rose Quartz Loose Stone 3.245ct

Brazilian Mica in Rose Quartz Loose Stone 3.245ct Sale price¥5,980
Brazilian Mica in Rose Quartz 8.773ct Loose Stone

Brazilian Mica in Rose Quartz 8.773ct Loose Stone Sale price¥9,800
【12562768掲載】ブラジル産マイカインローズクォーツ（雲母インローズクォーツ） 8.477ctルース

Brazilian Mica in Rose Quartz Cabochon, 8.477ct Sale price¥11,000
94ctルース

Mica in Quartz 0.594ct loose stone Sale price¥5,980
ラベンダークォーツ（スコロライト） 1.130ctルース

Lavender quartz (scorolite) 1.130ct loose stone Sale price¥5,980
ラベンダークォーツ（スコロライト） 2.181ctルース

Lavender quartz (scorolite) 2.181ct loose stone Sale price¥8,800
ラベンダークォーツ（スコロライト） 2.740ctルース

Lavender quartz (scorolite) 2.740ct loose stone Sale price¥8,800
クリストバライトインクォーツ 2.417ctルース

Cristobalite in Quartz 2.417ct Loose Stone Sale price¥8,800
レピドクロサイトインクォーツ 0.308ctルース

Lepidocrocite in quartz 0.308ct loose Sale price¥6,980
Lepidocrocite in quartz 1.087ct loose

Lepidocrocite in quartz 1.087ct loose Sale price¥5,980

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.