opal

Opal is the birthstone for October. It is broadly divided into two types: "precious opal" which exhibits play-of-color effect, and "common opal" which does not. The impression changes greatly depending on whether there is a play-of-color effect or not, but the atmosphere also changes depending on the way the play-of-color appears and the pattern, and if you own one, you will want to collect many more, making it a collector's item.

Karatz GemMagazine
" opal "

[12551148] Australian black opal 3.890ct loose stone Sale price¥69,800

Mexican Opal 0.499ct Loose Sale price¥3,980

Mexican Opal 0.854ct Loose Sale price¥5,980

Yellow Opal 0.372ct Loose (Faceted Cut) Sale price¥8,800

Mexican Hyalite Opal 1.215ct Loose (Faceted Cut) Sale price¥8,800

Ethiopian Opal 5.7mm/0.878ct Loose (Sphere) Sale price¥6,980

Mexican Opal 9.6mm/1.803ct Loose (Contralus Opal) Sale price¥49,800

Australian black opal 0.650ct loose Sale price¥15,800

Mexican Opal 1.666ct Loose Sale price¥14,800

[On sale June 7th at 10 PM] Australian Boulder Opal 41.775ct Loose Stone Sale price¥19,800

[On sale June 7, 10 PM JST] Australian Boulder Opal 12.216ct Loose Stone Sale price¥15,800

ピンクオパール・ブルーオパール2石セット（小・大サイズ） - KARATZ STORE｜カラッツSTORE

Pink opal/blue opal 2 stone set (small/large size)《Discount available for multiple purchases》 Sale priceFrom ¥1,980

【5/21 22時販売】【KEN氏】メキシコ産オパール1石（約3.5mm）《複数購入割引有》 - カラッツSTORE

1 Mexican opal (approx. 3.5mm) {Multiple purchase discounts available} Sale price¥3,980

Limited to 10 stones: Australian Opal Lottery with Certificate of Authenticity (including Australian Black Opal) (plus 1 Mexican Fire Opal) (Multiple purchase discounts available) Sale price¥6,980

Limited to 9 stones: 1 loose Australian opal (faceted cut) [Multiple purchase discounts available] Sale price¥3,980

Limited to 8 stones: Mexican Hyalite Opal Loose (Large 4ct, Fluorescent even in sunlight) Multiple purchase discounts available Sale price¥4,980

[On sale May 29th at 10 PM] "Checker x Sui" Koshu Kiseki Cut Mexican Fire Opal (usually 79,800 yen) Gacha with only 10 stones available. Win a Fire Opal (and receive one Contraluz!). [Multiple purchase discount available] Sale price¥5,980

Tucson New Arrivals / Limited to 28 Stones: Australian Andamooka Black Matrix Opal (Carbon Treated) 1 Loose Stone (Multi-purchase Discount Available) Sale price¥3,980

Tucson New Arrivals / Limited 18 Pieces / Peruvian Blue Opal, 1 piece / Bulk Purchase Discount Available Sale price¥3,980

Limited to 13 stones: Mexican Opal (Cabochon Cut) Gacha (Multiple purchase discounts available) Sale price¥2,980

Limited to 12 stones: Mexican opal (custom faceted cut) - 1 loose stone (multiple purchase discounts available) Sale price¥3,980

Limited to 11 stones: Sakura-shaped Contralus Opal and a specially cut Opal Gacha with one loose stone. Discounts available for multiple purchases. Sale price¥3,980

New Arrival from Tucson - Limited to 8 Stones: 1 Loose Australian Black Opal (Lightning Ridge Origin) - Multi-Purchase Discount Available Sale price¥5,980

Limited to 8 stones: 1 Mexican fire opal loose stone with unique color (up to 2.2ct) Multiple purchase discounts available Sale price¥3,980

Limited to 7 stones: 1 loose Australian iron opal (average 7ct, October birthstone opal) Multiple purchase discounts available Sale price¥4,980

Limited to 23 stones: Ethiopian Opal, 1 loose sphere (4.5-5.0mm) - Multiple purchase discounts available Sale price¥5,980

[On Sale May 2, 10 PM JST] 7 Limited Pieces - Mexican Opal, Max. 11ct (Includes items with minor flaws) - Multiple Purchase Discount Available Sale price¥3,980

《New Tucson Arrivals - Limited to 13 Stones》Mexican Opal, including B-grade stones (Egg-in-Opal and Water Opal) 《Multiple Purchase Discount Available》 Sale price¥2,980

Opal 0.123ct loose stone Sale price¥5,980

Limited to 7 stones: 1 loose Australian boulder opal (average 25 carats) Multiple purchase discounts available Sale price¥8,800

Limited to 12 stones Tanzanian Milky Opal Cat's Eye (7.5 x 5.5 mm) Multiple purchase discounts available Sale price¥3,980

Mexican Hyalite Opal 2.592ct loose Sale price¥9,800

[Sale on May 24th at 10 PM JST] Australian Black Opal 0.216ct Loose Sale price¥11,000

[On sale 5/22 at 10 PM] Australian Black Opal 0.325ct Loose Stone Sale price¥9,800

[On Sale May 22 at 10 PM JST] Australian Black Opal 1.393ct Loose Stone Sale price¥48,800

[On sale May 12th, 10 PM JST] Mexican Fire Opal (Faceted) 1.046ct Loose Stone Sale price¥29,800

[On Sale May 9th at 10 PM JST] Australian Opal with Matrix, 14.840ct, Loose Stone, Gemstone Report Sale price¥69,800

【Sale from 10 PM on May 3】Australian Boulder Opal 8.020ct Loose Gemstone with Certificate Sale price¥69,800

Mexican Cantera Opal 17.284ct Loose Sale price¥39,800

[On Sale May 6, 10 PM JST] [Colorfley] Pt900 Opal 2.61ct / Diamond 0.858ct Ring Sale price¥168,000

[Sales on May 5th at 10 PM] [Karafuri] K18 Fire Opal Ring with Certificate Sale price¥49,800

[Sale on May 26th at 10 PM] [Colorfri] K18 Synthetic Opal Pendant Top (Necklace Top) with Certificate of Authenticity Sale price¥39,800

【22602569掲載】【カラフリ】Pt900/K18 合成オパール 3.25ct ペンダントトップ（ネックレストップ）

[On Sale 5/5 at 10 PM] [Karafuri] Pt900/K18 Cresanbert/Kyocera Synthetic Opal 3.25ct and Diamond 0.25ct Pendant Top Sale price¥69,800

Mexican Cantera Opal 7.520 ct Loose Stone with Appraisal Sale price¥24,800

Mexican Cantera Opal 5.811 ct Loose Stone with Certificate Sale price¥29,800

Ethiopian honeycomb opal 3.566ct loose stone Sale price¥46,800

Ethiopian Opal 2.131ct Loose Sale price¥9,800

Ethiopian Opal 1.694ct Loose Sale price¥7,980

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.