【Applications close on Tuesday, August 4th at 10 am for lottery sale】13 carefully selected items, including yellow star sapphire, rare facet-cut trapiche emerald, and Burmese ruby.
Limited Quantity Lottery Sale.
【Application Period】
Until 10:00 AM on Tuesday, August 4, 2026
*Winners will be contacted by email by Wednesday, August 5.
▶︎About Myanmar Yellow Star Sapphire
We have prepared beautiful star sapphires where a six-rayed star clearly appears with light. Among these, this is a very rare unheated variety, and yellow star sapphires are even more unusual. The origin is Myanmar.
Product 1: Myanmar Unheated Yellow Star Sapphire 1.004ct Loose Stone with Japan-Germany Gemstone Institute Appraisal
Type of stone: Rare stone
Size: 6.0×4.9 mm
Weight: 1.004 ct
Accessories: Appraisal report (Japan-Germany Gemstone Institute), loose stone case (clear zip case if it doesn't fit)
Quantity: 1 piece
Price: 39,800 yen
Product ID: 12563751
If you would like to see more photos, please click here: https://store.karatz.jp/products/12563751 (viewing page)
▶︎About Leucite
Leucite is a gemstone mainly produced in Italy, presenting in white, colorless, and gray. Because gem-quality leucite is scarce, faceted pieces that appear on the market are rare stones. Some even exhibit phenomena like play-of-color, making it a captivating gemstone.
Product 2: Italian Leucite 4.0mm/0.209ct Loose Stone
Type of stone: Rare stone
Size: 4.0×4.0 mm
Weight: 0.209 ct
Accessories: Karatz Quality Guarantee, loose stone case (clear zip case if it doesn't fit)
Quantity: 1 piece
Price: 39,800 yen
Product ID: 12562362
If you would like to see more photos, please click here: https://store.karatz.jp/products/12562362 (viewing page)
Product 3: Italian Leucite 0.346ct Loose Stone
Type of stone: Rare stone
Size: 4.9×4.9 mm
Weight: 0.346 ct
Accessories: Karatz Quality Guarantee, loose stone case (clear zip case if it doesn't fit)
Quantity: 1 piece
Price: 49,800 yen
Product ID: 12562245
If you would like to see more photos, please click here: https://store.karatz.jp/products/12562245 (viewing page)
Product 4: Colombian Emerald 1.470ct Loose Stone
Type of stone: Rare stone
Size: 7.8×6.8 mm
Weight: 1.470 ct
Accessories: Sorting (Japan Gemological Association), Karatz Quality Guarantee, loose stone case (clear zip case if it doesn't fit)
Quantity: 1 piece
Price: 59,800 yen
Product ID: 12563982
If you would like to see more photos, please click here: https://store.karatz.jp/products/12563982 (viewing page)
▶︎About Trapiche Emerald
Trapiche emeralds, which display a six-rayed pattern, are rare gemstones found in only a small fraction of all emeralds produced. This pattern is believed to be formed when impurities become mixed during crystal growth and extend vertically along with the crystal.
Product 5: Colombian Trapiche Emerald 1.591ct Loose Stone with Japan-Germany Gemstone Institute Appraisal
Type of stone: Rare stone
Size: 8.9×7.3 mm
Weight: 1.591 ct
Accessories: Appraisal report (Japan-Germany Gemstone Institute), loose stone case (clear zip case if it doesn't fit)
Quantity: 1 piece
Price: 198,000 yen
Product ID: 12563834
If you would like to see more photos, please click here: https://store.karatz.jp/products/12563834 (viewing page)
▶︎About Pyrite-in-Emerald
Pyrite-in-emerald is a rare emerald containing pyrite, a golden mineral that looks like metal. The brilliance, as if the emerald is adorned with gold leaf, is very gorgeous and attractive. We have prepared large pieces with excellent transparency.
Product 6: Colombian Pyrite-in-Emerald 2.988ct Loose Stone with Japan-Germany Gemstone Institute Appraisal
Type of stone: Rare stone
Size: 11.7×9.1 mm
Weight: 2.988 ct
Accessories: Appraisal report (Japan-Germany Gemstone Institute), loose stone case (clear zip case if it doesn't fit)
Quantity: 1 piece
Price: 298,000 yen
Product ID: 12563833
If you would like to see more photos, please click here: https://store.karatz.jp/products/12563833 (viewing page)
▶︎About Montana Sapphire
Montana sapphire refers to sapphires produced in Montana, USA. The four main primary deposits in Montana are Yogo Gulch, Missouri River, Dry Cottonwood Creek, and Rock Creek. Sapphires from Yogo Gulch, in particular, are highly valued and popular due to their high quality. Yogo Gulch sapphires are often blue to purple and are typically said to be unheated.
Product 7: Unheated Montana Sapphire (Yogo Gulch) 0.186ct Loose Stone with Japan-Germany Gemstone Institute Analysis Report
Type of stone: Rare stone
Size: 3.4×3.4 mm
Weight: 0.186 ct
Accessories: Appraisal report/analysis report (Japan-Germany Gemstone Institute), loose stone case (clear zip case if it doesn't fit)
Quantity: 1 piece
Price: 98,000 yen
Product ID: 12562562
If you would like to see more photos, please click here: https://store.karatz.jp/products/12562562 (viewing page)
Product 8: Brazilian Emerald Cat's Eye 6.083ct Loose Stone with Japan-Germany Gemstone Institute Appraisal
Type of stone: Rare stone
Size: 13.7×10.6 mm
Weight: 6.083 ct
Accessories: Appraisal report (Japan-Germany Gemstone Institute), loose stone case (clear zip case if it doesn't fit)
Quantity: 1 piece
Price: 258,000 yen
Product ID: 12553542
If you would like to see more photos, please click here: https://store.karatz.jp/products/12553542 (viewing page)
Product 9: Burmese Ruby 1.020ct Loose Stone GIA
Type of stone: Rare stone
Size: 8.3×4.4 mm
Weight: 1.020 ct
Accessories: Appraisal report (GIA), loose stone case (clear zip case if it doesn't fit)
Quantity: 1 piece
Price: 188,000 yen
Product ID: 12563951
If you would like to see more photos, please click here: https://store.karatz.jp/products/12563951 (viewing page)
▶︎About Colombian No-Oil Emerald
Colombian No-Oil Emeralds are untreated emeralds that have not undergone oil treatment and are characterized by the almost complete absence of cracks or inclusions (internal flaws) that would typically allow oil to penetrate. We have prepared GIA certified loose stones with outstanding color and clarity.
Product 10: Colombian No-Oil Emerald 0.370ct Loose Stone GIA
Type of stone: Rare stone
Size: 6.5×4.1 mm
Weight: 0.370 ct
Accessories: Appraisal report (GIA), loose stone case (clear zip case if it doesn't fit)
Quantity: 1 piece
Price: 298,000 yen
Product ID: 12563953
If you would like to see more photos, please click here: https://store.karatz.jp/products/12563953 (viewing page)
Product 11: Diamond (H&C) 4.0mm/0.234ct Loose Stone (D, VVS-1, 3Excellent H&C)
Type of stone: Rare stone
Size: 4×4.03 mm
Weight: 0.234 ct
Accessories: Sorting (Central Gem Laboratory), Karatz Quality Guarantee, case
Quantity: 1 piece
Price: 59,800 yen
Product ID: 32501911
If you would like to see more photos, please click here: https://store.karatz.jp/products/32501911 (viewing page)
▶About Internally Flawless Diamonds
Internally Flawless refers to a clarity grade among the 4Cs used to evaluate diamonds. It assesses the diamond's transparency, specifically the absence of internal inclusions or blemishes. An Internally Flawless diamond shows no inclusions under 10x magnification, with only tiny surface blemishes barely visible.
Product 12: Internally Flawless Diamond (H&C) 0.206ct Loose Stone (D, IF, 3Excellent H&C)
Type of stone: Rare stone
Size: 3.79×3.82 mm
Weight: 0.206 ct
Accessories: Sorting (Central Gem Laboratory), Karatz Quality Guarantee, case
Quantity: 1 piece
Price: 89,800 yen
Product ID: 32501910
If you would like to see more photos, please click here: https://store.karatz.jp/products/32501910 (viewing page)
Product 13: [Karafuri] K18YG Idocrase 0.908ct Ring with Appraisal Report
Type of stone: Jewelry
Size: Approximately 3.55g
Weight: 0.908ct, 0.19ct
Accessories: Appraisal report (JTL (Jewel Trading Laboratory)), case
Quantity: 1 piece
Price: 128,000 yen
Product ID: 22602683
If you would like to see more photos, please click here: https://store.karatz.jp/products/22602683 (viewing page)
-------------------------------------------------
【How to Purchase if You Win and Important Notes】
・Regarding the results of the lottery sale, only winners will be contacted by email from our company. Please understand that we will not send notifications to non-winners.
・Winners will receive an email from us after the deadline, containing the URL to a dedicated page on the Karatz STORE. Please proceed with the purchase from there. Payment methods include credit card, bank transfer, and convenience store payment.
・Purchases must be completed within 72 hours from the time the winning email is sent. If the purchase is not made within that time, the lottery will be redrawn. Please note that we will not send a separate notification in such cases.
・Changes or cancellations to lottery sale applications are not possible. If you cancel due to personal reasons, your participation in future Karatz lottery sales may be refused. If you must cancel your application, please contact us during the lottery sale application period.
・For inquiries regarding lottery sales or cancellation requests, please contact us via the inquiry form or chat.
Please note that we cannot confirm contents sent via the application form.
・ We strive to ensure that product photos accurately reflect the actual colors, but due to lighting conditions during photography and monitor settings, there may be slight differences. Additionally, a penlight may have been used for some photographs.
・If you have any questions about the product, please inquire before purchasing.
・Although only about three photos are displayed on the lottery sale page, multiple photos are available on the product page, so please check them as well.
