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 "

Pt900 ビルマ産ルビー 1.07ct・ダイヤモンド0.32ctリング GIA

[22602674 Listed] [Karafuri] Pt900 Burma Ruby 1.07ct Ring Sale price¥258,000

[22602697 listed] [Colorfury] Pt850 Ruby 0.85ct Ring Sale price¥79,800

[On Sale July 31, 10 PM JST] Afghanistan Green Hauyne 0.062ct Loose Gemstone with Certificate Sale price¥16,800

[On sale July 29th at 10 PM] Afghan Green Hauyne 0.150ct Loose Stone with Certificate Sale price¥55,800

【Sales start July 29, 10 PM】[Colorfle] Pt900 Ruby 0.69ct, Diamond 0.16ct Ring with appraisal report Sale price¥188,000

[On sale July 27th at 10 PM] Brazilian color change fluorite, 1.099 ct loose stone Sale price¥9,800

[Listing 12563881] Green Afghan Hauyne 0.086ct Loose Stone Sale price¥22,800

[Listed as 12563874] Afghanistan Green Hauyne 0.185ct Loose Stone Sale price¥65,800

【Listed on 12563251】Afghan Hauyne 0.080ct Loose Sale price¥25,800

[Published on 12563087] Unheated Ruby 0.216ct Loose Stone Sale price¥59,800

[22602667 Posted] [Colorful] Pt900 Hauyne 0.035ct Ring Sale price¥89,800

Let's try jewelry polishing "Do-it-yourself rough stone polishing set" (for beginners: fluorite 2 stone set) Sale price¥2,980

宝石研磨に挑戦してみよう「自分で出来る原石磨きセット」（初心者向け：フローライト・アパタイト2石セット）

Let's try gem polishing "Do-it-yourself rough stone polishing set" (for beginners: fluorite/apatite 2 stone set) Sale price¥2,980

1 Ruby from Greenland (round cut, 1.2mm)《Discount available for multiple purchases》 Sale price¥2,280

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

ブラジル産カラーチェンジフローライト1石ルース（6mm,ラウンドカット）《複数購入割引有》

Color change fluorite from Brazil 1 stone loose (6mm, round cut)《Multiple purchase discount available》 Sale price¥2,580

Limited to 18 stones: Mozambique ruby (princess cut, 2.3-2.5mm) Multiple purchase discounts available Sale price¥3,980

Chinese color change fluorite 1 stone loose (6mm, round cut) {Multiple purchase discount available} Sale price¥1,980

[On sale June 21st at 10 PM] Ruby Gacha (with synthetic ruby as a bonus) including two pigeon blood rubies with appraisal certificates (limited to 15 stones) - Multiple purchase discount available Sale price¥5,980

Chinese color change fluorite 1 stone loose (7mm, round cut) {Multiple purchase discount available} Sale price¥2,580

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

Limited quantity: 1 impregnated ruby loose (4mm, round cut, identification instructions included) Multiple purchase discounts available Sale price¥1,980

[On Sale 5/6 10 PM] Limited to 10 Stones: Scapolite Gacha Featuring Koshu Kiseki Kiriko Plusthree "Akatsuki" (Normally ¥45,800) with a Chance to Win! [Multiple Purchase Discount Available] Sale price¥4,980

Set of two fluorite rough stones from Diana Maria and Lady Annabella, UK (multiple purchase discounts available) Sale price¥3,980

1.758 ct Ruby Loose Stone from Vietnam with Identification Report Sale price¥49,800

Mozambique Ruby 0.544ct Loose Stone with Certificate of Authenticity Sale price¥39,800

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

[Listed as 22602651] [Colorful] K9 Ruby Pendant Top (Necklace Top) Sale price¥19,800

[Item 12563407] Afghan Green Hauyne 0.075ct Loose Stone Sale price¥29,800

[#202607AkihabaraPopUpExhibition][Sale on July 4th at 10 PM] Mozambique Ruby 0.416ct Loose Stone with Certificate Sale price¥29,800

[Listed on 22602645] [Colorful] Pt900 Ruby 0.6ct Ring Sale price¥98,000

K18WG ルビー 0.94ct・ダイヤモンド0.66ctペンダントトップ（ネックレストップ）　鑑別書

[Published on 22602611] [Carafur] K18WG Ruby 0.94ct Pendant Top (Necklace Top) Sale price¥158,000

[On Sale June 28th at 10 PM] Afghanistan Green Hauyne 3.6mm/0.135ct Loose Stone with Appraisal Sale price¥35,800

[#202607 Akihabara Pop-up Store - Currently Away] [On Sale June 23rd, 10 PM JST] Unheated Ruby 0.207ct Loose Gemstone (Houseki Kyo) Sale price¥69,800

K18 白蝶真珠（白蝶パール）鳥モチーフペンダントトップ（ネックレストップ）鑑別書

[Sale on 6/22 at 10 PM] Colorful K18 White South Sea Pearl, 0.17ct Diamond, Ruby, Sapphire, Emerald Bird Motif Pendant Top (Necklace Top) with Appraisal Report Sale price¥198,000

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

【#202607 Akihabara Pop-up Store Takeout in Progress】【Sale on June 15, 10 PM】Afghan Hauyne 0.098ct Loose Stone with Certificate Sale price¥25,800

[Sale starts 6/20 at 10 PM] Afghan Hauyne 0.080ct Loose Stone with Certificate Sale price¥22,800

Scapolite 0.587ct loose stone from Japan and Germany Sale price¥8,800

[#202607 Akihabara Pop-up Store - Currently at the pop-up] [On sale June 13th, 10 PM JST] Ruby 0.820ct Loose Stone - Houseki Kyokai Sale price¥39,800

[#202607 Akihabara Popup Store - Currently Out of Store] [On Sale May 30th, 10 PM] Afghan Hackmanite 0.093ct Loose Gemstone Sale price¥16,800

[#202607 Akihabara Pop-up Store - Currently at the pop-up] [On sale May 31 at 10 PM] Hackmanite from Afghanistan 0.205ct Loose Stone Sale price¥36,800

[#202607 Akihabara Pop-Up Store Take-Out in Progress] [On sale June 2nd, 10 PM] Mozambique Ruby 0.464ct Loose Stone with Certificate Sale price¥29,800

Unheated Mozambique Ruby 2.7mm/0.135ct Loose Sale price¥19,800

Afghanite from Afghanistan 0.617ct loose stone Sale price¥69,800

German Awinite 0.070ct loose stone Sale price¥29,800

German Awinite 0.056ct loose stone Sale price¥22,800

[On Sale May 2 at 10 PM] Ruby 0.286ct Loose Gemstone with Identification Report Sale price¥22,800

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.