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fluorescent gemstones

There are some gemstones that emit a neon color when exposed to ultraviolet light. It is thought that the fluorescent substances contained in these materials emit light in response to ultraviolet light. When illuminated with black lights in a darkened room, the neon glow is truly a mystical world. There are many fluorescent gemstones, and they come in a variety of colors. From famous stones that everyone knows to rare rare stones. I think it's fun to collect various things and compare them.

Karatz GemMagazine
" Fluorescent gemstone "

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イギリス産ロジャリーフローライト 1.841ctルース

British Rosary Fluorite 1.841ct loose Sale price¥5,980
スキャポライトキャッツアイ 8.880ctルース

Scapolite Cat's Eye 8.880ct Loose Sale price¥8,800
Sold out 【お子様限定】宝石磨きに挑戦してみよう「自分で出来る原石磨きセット」（フローライト・宝石アイシングクッキー付き）

[For kids] Let's try gem polishing "Do-it-yourself rough stone polishing set" (includes fluorite and gemstone icing cookies) *Subject to gemstone polishing contest*

Sold out [Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery

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

Sold out Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for beginners: Inca Rose/Fluorite 2 stone set)

Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for beginners: Inca Rose/Fluorite 2 stone set)
Sold out 【大人用】宝石磨きに挑戦してみよう「自分で出来る原石磨きセット」（初心者向け：バイカラーフローライト）・ボルダーオパール付※原石磨きコンテスト対象 ※

[For adults] Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for beginners: bicolor fluorite) with boulder opal *Subject to the rough stone polishing contest*

Sold out 1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》

1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》

Sold out 含浸ルビー・天然ルビー見分け2点セット - KARATZ STORE｜カラッツSTORE

[Jeweler's Tools] 2-piece set for distinguishing impregnated rubies and natural rubies (discount available for multiple purchases)

Sold out Limited to 20 stones! Includes 6 red gemstones of pigeon blood ruby ​​with AGL certificate. Discounts available for multiple purchases.

Limited to 20 stones! Includes 6 red gemstones of pigeon blood ruby ​​with AGL certificate. Discounts available for multiple purchases.
Sold out 1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》

1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》
Sold out 《Limited to 15 Stones》Ruby Gacha with 2 Pigeon Blood Rubies with Certificates (Synthetic Ruby as a Bonus)《Multiple Purchase Discount Available》

《Limited to 15 Stones》Ruby Gacha with 2 Pigeon Blood Rubies with Certificates (Synthetic Ruby as a Bonus)《Multiple Purchase Discount Available》
Sold out 《限定17石》イギリス・ロジェリー産フローライト1石ルース《複数購入割引有》

Limited to 17 stones: 1 loose fluorite stone from Rogerley, England. Discounts available for multiple purchases.
Sold out Ruby Lottery: Win a 0.59ct Pigeon Blood Ruby with AIGS or a Burmese Star Ruby (Multiple Purchase Discounts Available)

Ruby Lottery: Win a 0.59ct Pigeon Blood Ruby with AIGS or a Burmese Star Ruby (Multiple Purchase Discounts Available)
Sold out グリーンランド産アイスルビー 1石（ハートシェイプ,4mm,ピンクサファイア）《複数購入割引有》

Greenland Ice Ruby 1 stone (heart shape, 4mm, pink sapphire) {Multiple purchase discount available}

Sold out [On Sale June 6th at 10 PM JST] "Limited 13 Stones" Fluorite Gacha including flawed Koshu cut gemstones "Bulk Purchase Discount Available"

[On Sale June 6th at 10 PM JST] "Limited 13 Stones" Fluorite Gacha including flawed Koshu cut gemstones "Bulk Purchase Discount Available"

Sold out 《Limited to 15 Stones》Fluorite Gacha including 2 Koshu-Kiseki-Kiriko stones (normally 49,800 yen) with 1 CC fluorite stone as a bonus《Multiple Purchase Discount Available》

《Limited to 15 Stones》Fluorite Gacha including 2 Koshu-Kiseki-Kiriko stones (normally 49,800 yen) with 1 CC fluorite stone as a bonus《Multiple Purchase Discount Available》
Sold out Red Gemstone Gacha including Pigeon Blood Ruby AIGS worth ¥60,000 💎 Ruby and Hot Pink Sapphire (Multiple Purchase Discounts Available)

Red Gemstone Gacha including Pigeon Blood Ruby AIGS worth ¥60,000 💎 Ruby and Hot Pink Sapphire (Multiple Purchase Discounts Available)
Sold out グリーンランド産ルビー 1石（ラウンドカット,2mm）

1 Ruby from Greenland (round cut, 2mm) with certificate

Sold out Bicolor Gacha including Brazilian parti-colored Paraiba tourmaline (CuO: 1.7%, MnO: 2.9%), bicolor sapphire, bicolor tourmaline, and specially cut bicolor fluorite, normally 79,800 JPY (multiple purchase discount available)

Bicolor Gacha including Brazilian parti-colored Paraiba tourmaline (CuO: 1.7%, MnO: 2.9%), bicolor sapphire, bicolor tourmaline, and specially cut bicolor fluorite, normally 79,800 JPY (multiple purchase discount available)
Sold out Hackmanite 1 stone (purple)

Hackmanite 1 stone (purple)

Sold out [6/ 10 PM JST Release] 《Limited to 11 Stones》Bicolor Gemstone Gacha featuring Paraiba Tourmaline and Euclase 《Bulk Purchase Discount Available》

[6/ 10 PM JST Release] 《Limited to 11 Stones》Bicolor Gemstone Gacha featuring Paraiba Tourmaline and Euclase 《Bulk Purchase Discount Available》
Sold out 《Purchased in Hong Kong》Afghan Green Hauyne 1 Piece Loose Stone with Full Stone Identification Report《Multiple Purchase Discount Available》

《Purchased in Hong Kong》Afghan Green Hauyne 1 Piece Loose Stone with Full Stone Identification Report《Multiple Purchase Discount Available》

Sold out Limited to 10 stones! Pigeon Blood Ruby (normally priced at 39,800 yen) Red Gemstone Gacha with AIGS Certificate (Multiple purchase discounts available)

Limited to 10 stones! Pigeon Blood Ruby (normally priced at 39,800 yen) Red Gemstone Gacha with AIGS Certificate (Multiple purchase discounts available)

Sold out Limited to 8 stones: 1 unheated silky pink sapphire from Vietnam (including silky ruby) Discounts for multiple purchases available

Limited to 8 stones: 1 unheated silky pink sapphire from Vietnam (including silky ruby) Discounts for multiple purchases available

Sold out Limited to 12 stones, Pakistani oil in quartz, moving bubbles, 1 loose stone, multiple purchase discounts available

Limited to 12 stones, Pakistani oil in quartz, moving bubbles, 1 loose stone, multiple purchase discounts available
Sold out Limited to 16 stones: Greenland Ruby, 1.2mm, Loose (Top Quality, Drawstring Pouch Included) Multiple Purchase Discounts Available

Limited to 16 stones: Greenland Ruby, 1.2mm, Loose (Top Quality, Drawstring Pouch Included) Multiple Purchase Discounts Available
Sold out Limited to 17 stones: 1 loose Afghanite stone from Afghanistan. Discounts available for multiple purchases.

Limited to 17 stones: 1 loose Afghanite stone from Afghanistan. Discounts available for multiple purchases.
Sold out Blue Stone Gacha💎 (Brazilian Paraiba Tourmaline, Mozambique Paraiba Tourmaline, German Auchenite, Benitoite) {Multiple Purchase Discounts Available}

Blue Stone Gacha💎 (Brazilian Paraiba Tourmaline, Mozambique Paraiba Tourmaline, German Auchenite, Benitoite) {Multiple Purchase Discounts Available}
Sold out Mini Kite Cut Loose Stone (Includes 2 Paraiba Tourmalines, Green Beryl, Ruby, Peridot, etc.) {Multiple Purchase Discounts Available}

Mini Kite Cut Loose Stone (Includes 2 Paraiba Tourmalines, Green Beryl, Ruby, Peridot, etc.) {Multiple Purchase Discounts Available}

Sold out Limited to 8 stones: Mexican Hyalite Opal Loose (Large 4ct, Fluorescent even in sunlight) Multiple purchase discounts available

Limited to 8 stones: Mexican Hyalite Opal Loose (Large 4ct, Fluorescent even in sunlight) Multiple purchase discounts available
Sold out 《Limited to 10 Stones》Flower-Cut Gem Gacha 💎 Usually 39,800 yen for Sakura-shaped and newly cut rubies (newly cut as a bonus) 《Bulk Purchase Discount Available》

《Limited to 10 Stones》Flower-Cut Gem Gacha 💎 Usually 39,800 yen for Sakura-shaped and newly cut rubies (newly cut as a bonus) 《Bulk Purchase Discount Available》
Sold out Limited to 10 stones: Greenland Ruby (2mm, with certificate issued by the mine owner) - 1 loose stone - Multiple purchase discounts available

Limited to 10 stones: Greenland Ruby (2mm, with certificate issued by the mine owner) - 1 loose stone - Multiple purchase discounts available
Sold out Greenland Ruby Loose (approx. 2.3mm, Top Color, Certificate Included) (Multiple Purchase Discounts Available)

Greenland Ruby Loose (approx. 2.3mm, Top Color, Certificate Included) (Multiple Purchase Discounts Available)

Sold out Limited to 5 stones: 1 Mexican Hyalite Opal loose stone (average 0.5ct) Multiple purchase discounts available

Limited to 5 stones: 1 Mexican Hyalite Opal loose stone (average 0.5ct) Multiple purchase discounts available
Sold out Tanzanian bicolor mint garnet 1 stone loose (UV type) {Multiple purchase discount available}

Tanzanian bicolor mint garnet 1 stone loose (UV type) {Multiple purchase discount available}

Sold out Afghanite 1 stone loose from Afghanistan《Discount available for multiple purchases》

Afghanite 1 stone loose from Afghanistan《Discount available for multiple purchases》
Sold out 《Limited 9 Stones》Blue Stone Gacha 💎 Brazilian Paraiba Tourmaline (CuO:2.2%.MnO:3.5%), Top Color Benitoite, Hauyne, Apatite 《Multi-Purchase Discount Available》

《Limited 9 Stones》Blue Stone Gacha 💎 Brazilian Paraiba Tourmaline (CuO:2.2%.MnO:3.5%), Top Color Benitoite, Hauyne, Apatite 《Multi-Purchase Discount 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 ジェムガチャ💎 アフガナイト1石 ルース（平均0.14ct）《複数購入割引有》

Gem Gacha💎 Afghanite 1 stone loose (average 0.14ct) {Multiple purchase discount available}

Sold out 《Limited to 8 stones》 [Mr. Sanjay] Hackmanite or Sodalite 1 stone loose (maximum 3.63 ct)《Multiple purchase discount available》

《Limited to 8 stones》 [Mr. Sanjay] Hackmanite or Sodalite 1 stone loose (maximum 3.63 ct)《Multiple purchase discount available》
Sold out グリーンランド産アイスルビー 1石（ハートシェイプ,4mm）

Ice ruby ​​from Greenland 1 stone (heart shape, 4mm) Comes with original pouch

Sold out アフガニスタン産ハックマナイト 0.142ctルース

[#202607 Akihabara Pop-up Store Carry Out] [12559782 Listed] Hackmanite 0.142ct Loose
Sold out ドイツ産アウイナイト 0.081ctルース

[Posted as 12563888] German Hauyne, 0.081ct Loose Gemstone
Sold out ビルマ産ピジョンブラッドルビー 0.300ctルース

[12563504 Listed] Unheated Pigeon Blood Ruby from Burma 0.300ct Loose
Sold out ルビー 0.226ctルース

Mozambique Ruby 0.226ct Loose
Sold out ビルマ産ルビー 0.120ctルース

Burmese ruby 3.1mm/0.120ct loose stone with gemological report
Sold out モザンビーク産ルビー 0.300ctルース

0.300 ct Loose Mozambique Ruby with Certificate
Sold out モザンビーク産ルビー 0.415ctルース

0.415ct Mozambique Ruby Loose Stone with Gemstone Identification Report

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.