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 "

[On Sale June 6th]《Limited to 9 Stones》Brazilian Amethyst Single Stone Loose (Includes Elestial and Bi-Color Amethyst)《Bulk Purchase Discount Available》 Sale price¥3,980

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

Brazilian Amethyst 9.749ct Loose Stone Sale price¥12,800

Pakistani Oil in Quartz 0.438ct Loose Stone Sale price¥6,980

[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] Sale price¥29,800

Mica in Quartz 0.758ct Loose Stone Sale price¥5,980

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

Lepidocrocite in quartz 0.532ct loose Sale price¥6,980

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） 7.682ctルース

[On sale 10 PM, June 6] Brazil Tinkerbell Quartz (Pink Fire Quartz) 7.682ct Loose Stone Sale price¥15,800

[Sales start May 31, 10 PM JST] Brazilian Marcasite in Quartz Loose Stone 6.670ct Sale price¥25,800

[Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery Sale price¥6,980

[Jeweler's Tools] Digital Caliper Color Shift Amethyst 2 Piece Set Sale price¥2,980

"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

1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》 Sale price¥1,500

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

Amethyst/Citrine 4mm (Epicot cut) 2 stone set《Multiple purchase discount available》 Sale price¥1,980

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

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

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

《New from Tucson, Limited to 17 Stones》High-transparency, high-quality Dumortierite in Quartz from Brazil《Multiple purchase discount available》 Sale price¥3,980

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

《Limited to 10 stones》Plumeria cut carving (Peridot, Blue Topaz, Citrine, Rose Quartz) 1 stone 《Bulk purchase discount available》 Sale price¥1,980

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

【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

Limited to 9 stones! Includes Koshu Kiriko plus three citrine gacha, normally priced at 29,800 yen. Discounts available for multiple purchases. Sale price¥2,980

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

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

Limited to 8 stones: Colombian mango quartz (up to 60 carats, average 21.6 carats) [Multiple purchase discounts available] Sale price¥1,980

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

[May 3, 10 PM JST Release] Dendritic Agate (Dendritic Quartz) Gacha - 1 Stone Loose Piece "Tucson New Arrivals / Limited 7 Stones" (Multi-Purchase Discount Available) 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 6 stones: Brazilian dendritic quartz (new to Tucson, average 2.5 carats) [Multiple purchase discounts available] Sale price¥3,980

[Available at 10 PM on February 2nd] Limited to 13 stones. Newly arrived in Tucson: Brazilian Dumortierite in Quartz, 1.1 carats average cabochon cut. Discounts available for multiple purchases. Sale price¥4,980

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

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

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

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

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

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

Amethyst 4.249ct rough stone Sale price¥4,980

Brazilian Quartz in Quartz 15.373ct Loose Stone Sale price¥18,800

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.