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spinel

Spinel is the birthstone for August. Spinel comes in a wide variety of colors, including red, blue, pink, green, purple, black, gray, and colorless. It has a high Mohs hardness of 7.5 to 8, so it can be enjoyed as everyday jewelry. They are often produced in the same octahedral crystal form as diamonds, and their rounded, soft form gives them a different charm than cut gemstones.

Karatz GemMagazine
" Spinel "

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Sold out Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for advanced users: rough spinel from Mozambique)

Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for advanced users: rough spinel from Mozambique)

Sold out Limited Edition of 10 Blue Gemstones! 💎 0.142ct Brazilian Paraiba Tourmaline, Euclase from Zimbabwe, 1.17ct Cobalt Spinel (Certificate of Authenticity: Color Shift), Benitoite, and More! Discounts Available for Multiple Purchases!

Limited Edition of 10 Blue Gemstones! 💎 0.142ct Brazilian Paraiba Tourmaline, Euclase from Zimbabwe, 1.17ct Cobalt Spinel (Certificate of Authenticity: Color Shift), Benitoite, and More! Discounts Available for Multiple Purchases!
Sold out Limited to 10 stones: Blue Spinel Gacha, Cobalt Spinel (including color-shifting type), 2 stones with Japanese and German appraisal certificates, and a bonus synthetic cobalt spinel. Discounts available for multiple purchases.

Limited to 10 stones: Blue Spinel Gacha, Cobalt Spinel (including color-shifting type), 2 stones with Japanese and German appraisal certificates, and a bonus synthetic cobalt spinel. Discounts available for multiple purchases.
Sold out Color Change Gacha💎 Burmese Color Change Zircon, Color Shift Sapphire, Color Shift Cobalt Spinel, and More (Multiple Purchase Discounts Available)

Color Change Gacha💎 Burmese Color Change Zircon, Color Shift Sapphire, Color Shift Cobalt Spinel, and More (Multiple Purchase Discounts Available)
Sold out Limited to 7 stones: 1 loose Sri Lankan spinel (lozenge cut) stone. Discounts available for multiple purchases.

Limited to 7 stones: 1 loose Sri Lankan spinel (lozenge cut) stone. Discounts available for multiple purchases.
Sold out Gem Gacha💎 [Sanjay] Tanzanian Spinel (1 in 3 will be a Red Spinel) Loose Stone (Multiple Purchase Discounts Available)

Gem Gacha💎 [Sanjay] Tanzanian Spinel (1 in 3 will be a Red Spinel) Loose Stone (Multiple Purchase Discounts Available)
Sold out Limited to 9 stones [Mr. Sanjay] Oil in quartz, spinel, yellow opal 1 loose stone (damaged) [Multiple purchase discount available]

Limited to 9 stones [Mr. Sanjay] Oil in quartz, spinel, yellow opal 1 loose stone (damaged) [Multiple purchase discount available]

Sold out Limited to 13 stones: 1 red spinel rough stone from Myanmar. Discounts available for multiple purchases.

Limited to 13 stones: 1 red spinel rough stone from Myanmar. Discounts available for multiple purchases.
Sold out Limited to 3 stones: Myanmar gray spinel and platinum spinel (4.0mm, round cut) loose stone (multiple purchase discounts available)

Limited to 3 stones: Myanmar gray spinel and platinum spinel (4.0mm, round cut) loose stone (multiple purchase discounts available)

Sold out Limited to 9 stones: 1 Spinel Gacha (August birthstone) including 1 bicolor spinel (0.93 ct) (Multiple purchase discounts available)

Limited to 9 stones: 1 Spinel Gacha (August birthstone) including 1 bicolor spinel (0.93 ct) (Multiple purchase discounts available)

Sold out スリランカ産コバルトスピネル 0.461ctルース

[Sale on June 7 at 10 PM] Sri Lankan Cobalt Spinel 4.7mm/0.461ct Loose Stone (Japan-Germany certified)
Sold out 【22602585掲載】【カラフリ】K18PG スピネル 0.48ct ペンダントトップ（ネックレストップ）

[On sale May 3rd, 10 PM JST] [Colorfury] K18PG Pink Spinel 0.48ct Pendant Top (Necklace Top) with Identification Card
Sold out パープルスピネル 0.520ctルース

Purple spinel 0.520ct loose
Sold out Synthetic Cobalt Spinel 0.466ct Loose

Synthetic Cobalt Spinel 0.466ct Loose
Sold out 【12562825掲載】ミャンマー産マスグラバイト／スピネル 8.005ctルース

8.005ct Loose Myanmar Masgravite/Spinel (Symbiotic Type) with Japan-German Gemmological Institute (GGTL) Certificate

Sold out タンザニア産ホットピンクスピネル 0.204ctルース

[On sale May 2 at 10 PM] Tanzanian Hot Pink Spinel 0.204ct Loose Stone with Certificate
Sold out 【12562750掲載】ミャンマー産レッドスピネル 0.257ctルース

Myanmar Red Spinel 3.7mm/0.257ct Loose Gemstone with Certificate

Sold out 【12562749掲載】タンザニア産オレンジスピネル 0.273ctルース

Tanzanian Orange Spinel 3.9mm/0.273ct Loose Stone with Gemstone Report

Sold out Synthetic Cobalt Spinel 1.342ct Loose Stone with Certificate

Synthetic Cobalt Spinel 1.342ct Loose Stone with Certificate
Sold out Myanmar Red Spinel 0.196ct Loose Stone

Myanmar Red Spinel 0.196ct Loose Stone
Sold out Sri Lankan Cobalt Spinel (Blue Spinel) 3.202ct Loose Stone (Needle-like Inclusions) Japan-German Rare Stone

Sri Lankan Cobalt Spinel (Blue Spinel) 3.202ct Loose Stone (Needle-like Inclusions) Japan-German Rare Stone

Sold out 【12547478掲載】ヴァイオレットスピネル 0.776ctルース

Myanmar Violet Spinel 0.776ct Loose

Sold out [12/6 22:00] Myanmar Spinel in Marble 61.204ct Loose Stone

[12/6 22:00] Myanmar Spinel in Marble 61.204ct Loose Stone
Sold out ミャンマー産スピネルインマーブル 39.231ctルース

Myanmar spinel in marble 39.231ct loose stone

Sold out 【サンジェ氏】パープルスピネル 0.995ctルース

Purple spinel 0.995ct loose stone
Sold out Synthetic spinel 1.793ct loose stone

Synthetic spinel 1.793ct loose stone
Sold out Synthetic cobalt spinel 1.886ct loose stone

Synthetic cobalt spinel 1.886ct loose stone
Sold out Spinel 0.310ct loose

Spinel 0.310ct loose
Sold out [Available at 10 PM on December 5th] 18K Yellow Gold Burmese Pink Spinel 3.9mm/0.276ct Hot Pink Spinel Ring

[Available at 10 PM on December 5th] 18K Yellow Gold Burmese Pink Spinel 3.9mm/0.276ct Hot Pink Spinel Ring
Sold out ピンクスピネル 0.409ctルース

Pink spinel 0.409ct loose
Sold out 【KEN氏】ミャンマー産パープルスピネル 0.872ctルース - カラッツSTORE

Myanmar Purple Spinel 0.872ct Loose Stone

Sold out バイカラースピネル 0.737ctルース

Bicolor spinel 0.737ct loose

Sold out ミャンマー産ホットピンクスピネル 0.276ctルース

0.276ct loose hot pink spinel from Myanmar
Sold out 【12534091掲載】ビルマ産レッドスピネル 0.418ctルース

Burmese red spinel 0.418ct loose
Sold out タンザニア産マヘンゲスピネル 0.697ctルース

Tanzanian Mahenge Spinel 0.697ct Loose Stone

Sold out レッドスピネル 0.346ctルース

Red spinel 0.346ct loose stone
Sold out 【KEN氏】ヴァイオレットスピネル 0.514ctルース - カラッツSTORE

Violet spinel 0.514ct loose stone
Sold out 【サンジェ氏】パープルスピネル 0.740ctルース

Sri Lankan Purple Spinel 0.740ct Loose Stone
Sold out タンザニア産コバルトスピネル 0.458ctルース

Tanzanian Cobalt Spinel 0.458ct Loose Stone with Certificate of Authenticity
Sold out ミャンマー産レッドスピネル 0.182ctルース

Myanmar Red Spinel 0.182ct Loose
Sold out オレンジスピネル 0.225ctルース

Orange spinel 0.225ct loose stone
Sold out スリランカ産ヴァイオレットスピネル 0.592ctルース

Sri Lankan Violet Spinel 0.592ct Loose

Sold out スタースピネル 0.936ctルース

Myanmar Star Spinel 0.936ct Loose
Sold out Pt950 スリランカ産コバルトスピネル 0.697ct リング

Pt950 Sri Lankan cobalt spinel 0.697ct ring by Nikkei
Sold out ミャンマー産レッドスピネル 0.234ct原石

Myanmar red spinel rough stone 0.234ct
Sold out ミャンマー産レッドスピネル 0.226ct原石

Myanmar red spinel rough stone 0.226ct
Sold out スリランカ産スピネル 0.763ctルース

Sri Lankan spinel 0.763ct loose stone

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.