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 "

"PSYCHO-PASS" x KARATZ collaboration jewelry: Shogo Makishima razor design ring (amethyst) Sale priceFrom ¥25,800

【一律1000円】アメリカ産・ハーキマーダイヤモンド（ロッククリスタル）1石原石

[Flat rate 1000 yen] 1 American Herkimer diamond (rock crystal) rough stone (discount available for multiple purchases) Sale price¥1,000

1 American Herkimer Diamond (rock crystal) 💎 (child-bearing type)《Multiple purchase discount available》 Sale price¥2,980

Gem Gacha💎 Lepidolite in Quartz 1 stone《Multiple purchase discount available》 Sale price¥3,980

Limited Edition Tucson Lucky Dip Gems 💎 Guaranteed 1 stone from 8 types (Benitoite, Anthill Garnet, Dumortierite in Quartz, Eudialyte, etc.) 《Multi-purchase discount available》 Sale price¥3,980

Brazilian rutilated quartz (rutilated quartz) 1 loose stone (6mm) {Multiple purchase discounts available} Sale price¥1,500

Brazilian rutilated quartz (rutile/rutile quartz (rutilated quartz)) 1 loose stone (6.0-6.5mm, for beginners) {Multiple purchase discounts available} Sale price¥2,580

Limited Quantity: Colombian Mango Quartz (Small - Thick) Multiple Purchase Discounts Available Sale price¥1,280

[Available 9/19 at 10 PM] 《Limited to 26 stones》 Oil-in-Quartz from Pakistan 《Multi-purchase discounts available》 Sale price¥1,580

Rutilated quartz 1 stone loose (12mm)《Multiple purchase discount available》 Sale price¥1,980

[7/ 22:00 JST Release] Indian Green Phantom Quartz (Multiple Purchase Discount Available) Sale price¥1,980

Limited quantity: Colombian mango quartz (medium size) Multiple purchase discounts available Sale price¥1,680

Limited Quantity: Colombian Mango Quartz (Small Size - Slim Type) Multiple Purchase Discounts Available Sale price¥1,180

【宝石商の道具】冷却ヒビ入れ染色クォーツ色違い2石セット - カラッツSTORE

[Jeweler's Tools] Cooling Cracked Dyed Quartz Set of 2 Stones in Different Colors (Discount available for multiple purchases) Sale price¥2,980

[Available at 10 PM on February 2nd] Limited to 10 stones! Takeshi Yamamoto Cut Gemstone Gacha! Fire Flower Cut Rock Crystal and More! Discounts Available for Multiple Purchases! Sale price¥7,980

Limited to 11 stones: Brazilian rhodonite in quartz (cabochon, 7.5-8.5mm) 1 loose stone. Discounts available for multiple purchases. Sale price¥2,980

《Limited to 12 Stones》New Tucson Arrival: High-Quality Brazilian Dumortierite in Quartz (Faceted Cut)《Multiple Purchase Discount Available》 Sale price¥4,980

Limited to 14 stones: Brazilian dendritic quartz loose stone (average 7 carats) Multiple purchase discounts available Sale price¥2,980

《Tucson Arrivals - Limited to 6 Stones》Brazilian Black Garden Quartz, Average 3.6ct《Bulk Purchase Discount Available》 Sale price¥6,980

Limited to 10 stones: One Saint-Jay cut amethyst (5.0-5.5mm, special cut round) loose stone. Discounts available for multiple purchases. Sale price¥3,980

November birthstone citrine rough and loose stone set of 2 (Madeira citrine, from Brazil) {Multiple purchase discounts available} {For beginners} Sale price¥3,980

[On sale May 10th, 10 PM JST] 6 Limited Pieces - Brazilian Mica in Rose Quartz (One stone), Multiple Purchase Discount Available Sale price¥2,980

Limited to 9 Stones: Brazilian Amethyst Loose Stones (Including Elestial and Bicolor Amethyst) - Multiple Purchase Discount Available Sale price¥3,980

[Limited to 9 stones] Brazilian green quartz 1 stone loose (10mm) [Multiple purchase discount available] Sale price¥3,980

[10/2 10 PM Sale] <<limited to stones>> Brazilian Bicolor Amethyst Gacha - 1 loose stone (approx. 9x7mm) <<multi-purchase discount available>></multi-purchase></limited>

[10/2 10 PM Sale] <> Brazilian Bicolor Amethyst Gacha - 1 loose stone (approx. 9x7mm) <> Sale price¥3,980

《Limited to 17 Stones》Brazilian Hematite in Quartz and Actinolite in Quartz (including those with a gemological report) - 1 Stone Loose - 《Multiple Purchase Discount Available》 Sale price¥3,980

《New from Tucson! Limited 11 Stones》Faceted Dumortierite in Quartz from Brazil《Multi-purchase discount available》 Sale price¥5,980

Limited to 7 stones: Brazilian Limonite in Quartz, 1 loose stone (average 6 carats) [Multiple purchase discounts available] Sale price¥5,980

Limited to 5 stones: 1 Brazilian Rhodonite in Quartz (faceted cut) (Multiple purchase discounts available) Sale price¥4,980

Madeira Citrine from Brazil (6mm, round cut, November birthstone) {Multiple purchase discounts available} Sale price¥4,980

《Limited to 6 stones》 1 stone loose green quartz from Brazil (8mm, concave cut) 《Discount available for multiple purchases》 Sale price¥3,980

【10/23 22時販売】《限定3石》クォーツアイトガチャ1石ルース（カスタムカット、4.7～4.9ｍｍ、サンジェ氏）《複数購入割引有》 Sale price¥3,980

Brazilian Quartz 13.991ct Loose Patch Sale price¥7,980

Pakistan Ruby in Quartz 1.429ct Loose Stone Sale price¥9,800

Brazilian Paraiba Tourmaline in Quartz 2.827ct loose stone Sale price¥45,800

Brazilian Paraiba Tourmaline in Quartz 4.5mm/0.284ct Loose Stone Sale price¥19,800

Brazilian Paraiba Tourmaline in Quartz 1.146ct Loose Stone Sale price¥25,800

Brazilian Paraiba Tourmaline in Quartz 8.0mm/1.287ct Loose Stone Sale price¥25,800

Brazilian Medusa Quartz (Paraiba Quartz) 7.250ct Loose Sale price¥45,800

【10/28 22時販売】【カラフリ】K18 ルチルクォーツ（ルチルレイテッドクォーツ）4.48ct エメラルド0.19ct リング鑑別書　 Sale price¥128,000

【10/28 22時販売】クォーツァイト 2.619ctルース Sale price¥14,800

【10/28 22時販売】クォーツァイト 0.858ctルース Sale price¥8,800

【10/28 22時販売】クォーツァイト 0.741ctルース Sale price¥7,980

【10/23 22時販売】《限定2石》クォーツアイトガチャ1石ルース（ローズカット、5.5～6.1ｍｍ、サンジェ氏）《複数購入割引有》 Sale price¥5,980

[12560799 Listed] Brazilian Elestial Amethyst 0.819ct Loose Stone Sale price¥9,800

[Item No. 12560796] Brazilian Elestial Amethyst 1.965ct Loose Stone Sale price¥18,800

[Available 10/4, 10 PM] Brazilian Amethyst 4.850ct Loose Gemstone Sale price¥12,800

[Available 10/4, 10 PM] Brazilian Amethyst 3.842ct Loose Gemstone 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.