Birthstone list
![[On sale from 10/4 at 10 PM] [Limited to 17 stones] Tanzanian Bicolor Sapphire Loose Stone [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010326.jpg?v=1759127192&width=4000)
![[On sale from 10/10 at 10 PM] [Limited to 10 stones] Brazilian Bicolor Tourmaline Loose Stone (Baguette Cut) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/14_15be1edf-3bee-4b6c-a802-65c04eb4d4a9.png?v=1759454008&width=1500)
![[On sale from 10/5 at 10 PM] Limited to 9 stones: 1 loose Australian opal (faceted cut) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/15_dc816088-689d-48f9-a277-773d85ed082c.png?v=1759454434&width=1500)
![[On sale at 10 PM on September 28th] [Limited to 9 sets] Rainbow Garnet Rough Stone + 2 Loose Stones Set from Tenkawa Village, Nara Prefecture [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/9_622850c1-b0a5-4d6d-a4b7-e4d8395feec1.png?v=1758934193&width=4000)
【10/12 22時販売】《限定14石》モザンビーク産ホットピンクサファイア1石ルース(ペアシェイプ,約4×3mm)《複数購入割引有》
Sale price¥4,980
【10/12 22時販売】《限定7石》ロシア産ノンオイルエメラルド1石ルース(1.5-1.6ｍｍ,ステップカット)《複数購入割引有》
Sale price¥5,980
![[On sale from 10/3 at 10 PM] [Limited to 9 stones] Tanzanite loose stone from Tanzania (5x7mm, oval cut) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010262_29e03c94-ed12-4e3a-ab52-597ab956c1da.jpg?v=1759117281&width=4000)
【10/18 22時販売】《限定10石》グリーンランド産ルビー（2mm,鉱山主発行の証明書付き）》1石ルース《複数購入割引有》
Sale price¥3,980
【10/13 22時販売】Pt900アイスブルーダイヤモンド0.333ct 0.333ct・アコヤパール8.0mmピアス
Sale price¥98,000
【10/13 22時販売】ブラジル産アレキサンドライト 0.097ctルース（エメラルドカット）
Sale price¥38,800
【10/12 22時販売】オーストラリア産クリスタル＆ホワイトオパール１３石ハーフエタニティリングセット（2.0mm)
Sale price¥79,800
【10/13 22時販売】モザンビーク産パライバトルマリン 1.309ctルース（酸化鉄インクルージョン含む）
Sale price¥98,000
[10/12 22:00 Sale] Unheated Royal Blue Sapphire 0.640ct Loose AIGS
Sale price¥158,000
[10/12 22:00 Sale] Sri Lankan Star Sapphire 1.093ct Loose
Sale price¥8,800
[10/12 22:00 Sale] Brazilian Paraiba Tourmaline 0.052ct Loose Stone
Sale price¥29,800
[10/12 22:00 Sale] Brazilian Rubellite 2.588ct Loose Stone
Sale price¥69,800
[10/12 22:00 Sale] Pigeon Blood Ruby 0.320ct Loose Stone AIGS
Sale price¥48,800
![[Available at 10/12 22:00] 18K Yellow Gold Brazilian Santa Maria Aquamarine 0.284ct Pendant (Necklace)](http://store.karatz.jp/cdn/shop/files/P1016298_f5cbd9ee-df80-41bf-8dc4-086413f36646.jpg?v=1760001284&width=3194)
Australian boulder opal 1.457ct loose stone
Sale price¥9,800
[12559180] Brazilian London Blue Topaz 0.415ct Loose
Sale price¥6,980
[12559081] Brazilian Aquamarine 0.428ct Loose Stone
Sale price¥8,800
Pigeon Blood Ruby 0.290ct Loose
Sale price¥59,800
Padparadscha sapphire 0.251ct loose stone
Sale price¥45,800
Padparadscha sapphire 0.376ct loose stone
Sale price¥55,800
[12560906] Russian Demantoid Garnet (Horsetail) 0.079ct Loose Stone
Sale price¥12,800
[12560905] Russian Demantoid Garnet (Horsetail) 0.075ct Loose Stone
Sale price¥12,800
![[12560902] Russian Demantoid Garnet (Horsetail) 0.487ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PA109778.jpg?v=1760833435&width=4000)
[12560902] Russian Demantoid Garnet (Horsetail) 0.487ct Loose Stone
Sale price¥110,000
![[12560901] 0.192ct loose demantoid garnet from Russia](http://store.karatz.jp/cdn/shop/files/PA109734_673d8bac-65cf-46d5-9c47-e6711712ecf4.jpg?v=1760833435&width=3031)
[12560901] 0.192ct loose demantoid garnet from Russia
Sale price¥98,000
![[12560895] Russian Demantoid Garnet (Horsetail) 0.067ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PA109652.jpg?v=1760833434&width=4000)
[12560895] Russian Demantoid Garnet (Horsetail) 0.067ct Loose Stone
Sale price¥14,800
![[12560881] Brazilian Bicolor Tourmaline 1.449ct Loose](http://store.karatz.jp/cdn/shop/files/PA109172.jpg?v=1760833436&width=4000)
[12560881] Brazilian Bicolor Tourmaline 1.449ct Loose
Sale price¥19,800
![[12560880] Brazilian Bicolor Tourmaline 0.621ct Loose](http://store.karatz.jp/cdn/shop/files/PA109154.jpg?v=1760833436&width=4000)
[12560880] Brazilian Bicolor Tourmaline 0.621ct Loose
Sale price¥12,800
[12552640] Unheated Brazilian Paraiba Tourmaline 0.073ct loose stone
Sale price¥69,800
[12552618] Unheated Brazilian Paraiba Tourmaline 0.063ct loose stone
Sale price¥65,800
[12551692] Colombian Trapiche Emerald 0.538ct Rough Stone
Sale price¥22,800
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.
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.