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 "

Dumortierite in quartz 0.931ct loose Sale price¥15,800

Brazilian Medusa Quartz (Paraiba Quartz) 3.122ct Loose Stone Sale price¥15,800

Brazilian Medusa Quartz (Paraiba Quartz) 1.132ct Loose Stone Sale price¥6,980

Brazilian Medusa Quartz (Paraiba Quartz) 1.529ct Loose Stone Sale price¥6,980

Brazilian Medusa Quartz (Paraiba Quartz) 1.241ct Loose Stone Sale price¥6,980

Brazilian Medusa Quartz (Paraiba Quartz) 1.405ct Loose Stone Sale price¥8,800

Brazilian dendritic quartz 3.608ct loose stone Sale price¥9,800

【甲州貴石切子plusthree】グリーンクォーツ 6mm/0.714ctルースワッペン付

[Koshu Precious Stones Plusthree] Green Quartz 6mm/0.714ct Loose Stone with Patch Sale price¥25,800

Dumortierite in quartz 0.387ct loose Sale price¥8,800

Lepidocrocite in quartz 0.308ct loose Sale price¥8,800

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

Lepidocrocite in quartz 0.770ct loose Sale price¥6,980

Lepidocrocite in quartz 0.782ct loose Sale price¥6,980

Lepidocrocite in quartz 1.096ct loose Sale price¥9,800

Lepidocrocite in quartz 1.324ct loose Sale price¥6,980

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

Brazilian Medusa Quartz (Paraiba Quartz) 2.484ct loose stone Sale price¥39,800

Brazilian Quartz in Quartz 14.298ct Loose Stone Sale price¥25,800

[Sakura Incut] Smoky Quartz 22mm/27.511ct Loose Japanese-German Edition Sale price¥98,000

Brazilian Medusa Quartz (Paraiba Quartz) 2.524ct loose Sale price¥35,800

Brazilian Medusa Quartz (Paraiba Quartz) 1.317ct loose Sale price¥24,800

Brazilian Paraiba tourmaline in quartz 1.602ct loose Sale price¥49,800

Rutilated Quartz (Rutile Quartz) 7.440ct Loose (Sun Rutilated Quartz) Sale price¥25,800

Rutilated Quartz (Rutilated Quartz) 9.721ct Loose (Sun Rutilated Quartz) Sale price¥29,800

Rutilated Quartz (Rutilated Quartz) 16.795ct Loose (Sun Rutilated Quartz) Sale price¥49,800

Aquamarine in quartz 18.954ct rough stone Sale price¥15,800

Platinum Rutilated Quartz (Brookier Lepidocrocite in Quartz) 7.354ct Loose Sale price¥19,800

Platinum Rutilated Quartz (Brookier Lepidocrocite in Quartz) 5.645ct Loose Sale price¥15,800

Platinum Rutilated Quartz (Brookier Lepidocrocite in Quartz) 9.457ct Loose Sale price¥25,800

Platinum Rutilated Quartz (Brookier Lepidocrocite in Quartz) 6.439ct Loose Sale price¥16,800

Brazilian lepidocrocite in quartz 0.992ct loose Sale price¥4,980

Dendritic quartz 4.272ct loose Sale price¥9,800

Dendritic quartz 3.875ct loose Sale price¥8,800

[Koshu Precious Stones plusthree] Green Quartz 6mm/0.743ct Loose with Patch Sale price¥25,800

[Moonsteiner] Pyrite in Quartz 18.288ct Loose Sale price¥59,800

Brazilian Paraiba tourmaline in quartz 0.819ct loose Sale price¥15,800

Medusa Quartz (Paraiba Quartz) 1.855ct loose Sale price¥25,800

【12548939掲載】マダガスカル産ラズライトインクォーツ 1.600ctルース

Lazurite in quartz from Madagascar 7.5mm/1.600ct loose Sale price¥18,800

【12548938掲載】マダガスカル産ラズライトインクォーツ 1.090ctルース

Lazurite in quartz from Madagascar 1.090ct loose Sale price¥14,800

【12548937掲載】マダガスカル産ラズライトインクォーツ 0.990ctルース

Lazurite in quartz from Madagascar 0.990ct loose Sale price¥14,800

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

マダガスカル産オイルインクォーツ1石ルース（近年発見の新しい産地,平均28ct）《複数購入割引有》

[Limited to 7 stones] 1 loose oil-in-quartz stone from Madagascar (new locality discovered in recent years, average 28ct) [Multiple purchase discounts available] Sale price¥8,800

Pakistani Oil in Quartz 0.651ct Loose Stone Sale price¥9,800

Pakistani oil-in quartz 0.595ct loose Sale price¥8,800

Pakistani Oil in Quartz 0.443ct Loose Stone Sale price¥6,980

Pakistani oil-in quartz 0.427ct loose (type with moving bubbles) Sale price¥9,800

[Sakura in-cut] Lavender quartz (scorolite) 8mm/ 2.161ct loose Sale price¥19,800

Oil-in-quartz 24.653ct rough stone from Madagascar Sale price¥9,800

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の取り組みと社会貢献

業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。

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.