

















Unheated Ruby 4.5mm/0.430ct Loose GIT
Ruby has been a treasured gemstone since ancient times. It is a type of red corundum. With a hardness rating of 9, ruby is the second hardest gemstone after diamond, and is also tough, stable, and easy to handle. This is a rare, unheated ruby.
It comes with a certificate of authenticity issued by the GIT, an appraisal agency run by the National Gem and Jewelry Institute of Thailand. It has been carefully cut so that there is no color loss even when viewed from the front.
Type: Loose (natural stone)
Stone name: Unheated ruby
・Weight: 0.430ct
・Size: 4.4 x 4.5 mm
Shape: Round cut
Scratches/chips: A+
Inclusions: A+
·remarks:---
Accessories: Certificate of Authenticity (GIT), loose case (if it does not fit, a clear zippered case)
▷We accept jewelry processing.If you would like to have your jewelry processed, please order along with the frame of your choice from the link below.
・Simple order [Select by stone]
・[Select from stones] Semi-order
*If you would like an image photo of the stone in the frame, would like to discuss a full order, or have any other questions or concerns, please feel free to contact us here .
*Rough stones are not available. There are also some stones that cannot be used.
*We strive to make the colors in the photos as close to the actual product as possible, but they may look slightly different from the actual product depending on the lighting conditions during photography and the monitor settings you are using. Also, some photos may have been taken using a penlight.
*For information on scratches, chips, treatments, and inclusions, please click here .
*For other frequently asked questions, please click here .
karatz_item_id: 12559838
Choose options






![[6/ 10 PM JST Release] 《Limited to 11 Stones》Bicolor Gemstone Gacha featuring Paraiba Tourmaline and Euclase 《Bulk Purchase Discount Available》](http://store.karatz.jp/cdn/shop/files/2026-08-0914.21.02.png?v=1786252887&width=1343)
![[Use the #202509 Campaign] 2025 New Year's Lucky Bag 🎍 Gem Gacha Lucky Bag with 4 or more gemstones (worth ¥25,000) [Discount for bulk purchase of lucky bags]](http://store.karatz.jp/cdn/shop/files/gazou.png?v=1785994448&width=1254)
![[On Sale 10 PM, June 7] *Limited to 3 Sets* 1.0ct/D/VS-VVS/IDEAL Lab-Grown Diamond (Synthetic Diamond) & 2 Rare Cabochon Stones (Total of 3 Stones Included) *Multiple Purchase Discount Available*](http://store.karatz.jp/cdn/shop/files/collage_07f6900d-fa8d-4bc4-acda-dc4cf0e8fed7.png?v=1785923452&width=4000)
![[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"](http://store.karatz.jp/cdn/shop/files/collage_0f6126db-fe6e-4ec4-ab15-e86a0e08371b.png?v=1786253811&width=2000)
![[Posted on 12563959] Madagascar Padparadscha Sapphire 0.164ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P7241965_cec751e0-3766-4ff6-a740-715fc57f7e8e.jpg?v=1786398430&width=2936)




















![[Jeweler's tools] 4-piece set including loupe (10x magnification), tweezers, and 2 loose stones](http://store.karatz.jp/cdn/shop/files/P4130575.jpg?v=1776126091&width=4000)