Ring - 18 kt. Yellow gold - 0.75ct. tw. Ruby
05
days
08
hours
23
minutes
06
seconds
Starting bid
€ 1
Reserve price not met
Expert
Selected by Laura Trevino
She has 15 years' auction experience, specialising in vintage jewellery from 1920 to 2000.
Estimate € 550 - € 650
No bids placed
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18 kt yellow gold ruby ring with ten square-cut rubies in a channel setting totaling approximately 0.75 ct, bearing the MGAB maker’s mark for K. G. Markströms Guldsmeds AB of Sweden, EU size 50 (US 5¼), in excellent vintage condition with no laboratory report.
AI-assisted summary
Description from the seller
Attractive vintage 18 kt yellow gold ruby ring by K. G. Markströms Guldsmeds AB, a Swedish jewellery maker identified by the registered MGAB maker’s mark. The ring combines a substantial polished yellow-gold band with a clean channel-set row of square-cut rubies, creating a refined late-20th-century Scandinavian design.
The ring is crafted in 18 karat yellow gold and bears the MGAB hallmark, associated with K. G. Markströms Guldsmeds AB of Uppsala, Sweden. Markströms was an established Swedish goldsmithing firm active throughout much of the 20th century and is known for well-made precious-metal jewellery carrying Swedish assay and maker’s marks.
The front of the ring is set with a linear row of square-cut rubies, arranged in a recessed channel across the face of the band. The geometric ruby setting contrasts strongly with the warm yellow gold and gives the ring a distinctly modern Scandinavian appearance.
The combined ruby weight is approximately 0.75 carat. The stones show a rich red to purplish-red colour and are cut in a square step-style form, creating a structured and elegant look.
The ring has an inner diameter of approximately 16 mm, corresponding roughly to EU size 50 / US size 5¼, making it suitable for a smaller finger size.
Details
Type: Ruby ring
Maker: K. G. Markströms Guldsmeds AB
Maker’s mark: MGAB
Country of origin: Sweden
Era: 1900–2000
Style: Modern / Scandinavian
Metal: 18 kt yellow gold
Gold fineness: 750 / 18 karat
Main gemstones: Ruby
Estimated total ruby weight: approximately 0.75 ct
Gemstone shape: Square
Cutting style: Square step / squared emerald-style cut
Setting: Channel set
Ring inner diameter: approximately 16 mm
Approximate ring size: EU 50 / US 5¼
Gender: Women
Laboratory report: None
Condition: Excellent vintage condition with only minimal signs of previous wear
The MGAB maker’s mark is an important feature of the piece and identifies it as Swedish goldsmith jewellery rather than an anonymous modern ring. The combination of a recognised Swedish maker, 18 kt gold construction and geometric ruby setting gives the ring additional collector interest.
The ring is particularly suitable for buyers searching for MGAB jewellery, Markströms gold ring, Swedish 18 kt gold ring, vintage ruby ring, Scandinavian jewellery, 18k yellow gold ruby ring, square ruby ring, channel set ruby ring, Swedish vintage jewellery, Uppsala goldsmith jewellery, estate jewellery or fine ruby jewellery.
The photographs form an important part of the description and show the actual ring offered for sale, including the MGAB hallmark, gold construction, ruby setting and overall condition.
The ring will be carefully packaged and shipped securely with tracking and insurance where available.
Seller's Story
♛ The Jewelry Company ♛
Welcome to The Jewelry Company, a trusted seller of gemstones, fine jewelry, watches, precious-metal items, and carefully selected collectibles.
Our collection includes loose gemstones, gold and silver jewelry, rings, bracelets, necklaces, vintage and modern watches, pocket watches, and other distinctive objects. Every item is individually inspected, accurately described, and photographed to give buyers a clear understanding of its condition and character.
We regularly offer both wearable pieces and collectible items, ranging from elegant everyday jewelry to unusual vintage finds and rare specialist objects. Our selection changes frequently, with new lots added on a regular basis.
We are committed to professional service, secure packaging, careful handling, and reliable worldwide shipping. Whether you are a collector, dealer, investor, or simply searching for a unique piece, we aim to provide attractive objects at competitive auction prices.
Thank you for visiting ♛ The Jewelry Company ♛
Attractive vintage 18 kt yellow gold ruby ring by K. G. Markströms Guldsmeds AB, a Swedish jewellery maker identified by the registered MGAB maker’s mark. The ring combines a substantial polished yellow-gold band with a clean channel-set row of square-cut rubies, creating a refined late-20th-century Scandinavian design.
The ring is crafted in 18 karat yellow gold and bears the MGAB hallmark, associated with K. G. Markströms Guldsmeds AB of Uppsala, Sweden. Markströms was an established Swedish goldsmithing firm active throughout much of the 20th century and is known for well-made precious-metal jewellery carrying Swedish assay and maker’s marks.
The front of the ring is set with a linear row of square-cut rubies, arranged in a recessed channel across the face of the band. The geometric ruby setting contrasts strongly with the warm yellow gold and gives the ring a distinctly modern Scandinavian appearance.
The combined ruby weight is approximately 0.75 carat. The stones show a rich red to purplish-red colour and are cut in a square step-style form, creating a structured and elegant look.
The ring has an inner diameter of approximately 16 mm, corresponding roughly to EU size 50 / US size 5¼, making it suitable for a smaller finger size.
Details
Type: Ruby ring
Maker: K. G. Markströms Guldsmeds AB
Maker’s mark: MGAB
Country of origin: Sweden
Era: 1900–2000
Style: Modern / Scandinavian
Metal: 18 kt yellow gold
Gold fineness: 750 / 18 karat
Main gemstones: Ruby
Estimated total ruby weight: approximately 0.75 ct
Gemstone shape: Square
Cutting style: Square step / squared emerald-style cut
Setting: Channel set
Ring inner diameter: approximately 16 mm
Approximate ring size: EU 50 / US 5¼
Gender: Women
Laboratory report: None
Condition: Excellent vintage condition with only minimal signs of previous wear
The MGAB maker’s mark is an important feature of the piece and identifies it as Swedish goldsmith jewellery rather than an anonymous modern ring. The combination of a recognised Swedish maker, 18 kt gold construction and geometric ruby setting gives the ring additional collector interest.
The ring is particularly suitable for buyers searching for MGAB jewellery, Markströms gold ring, Swedish 18 kt gold ring, vintage ruby ring, Scandinavian jewellery, 18k yellow gold ruby ring, square ruby ring, channel set ruby ring, Swedish vintage jewellery, Uppsala goldsmith jewellery, estate jewellery or fine ruby jewellery.
The photographs form an important part of the description and show the actual ring offered for sale, including the MGAB hallmark, gold construction, ruby setting and overall condition.
The ring will be carefully packaged and shipped securely with tracking and insurance where available.
Seller's Story
♛ The Jewelry Company ♛
Welcome to The Jewelry Company, a trusted seller of gemstones, fine jewelry, watches, precious-metal items, and carefully selected collectibles.
Our collection includes loose gemstones, gold and silver jewelry, rings, bracelets, necklaces, vintage and modern watches, pocket watches, and other distinctive objects. Every item is individually inspected, accurately described, and photographed to give buyers a clear understanding of its condition and character.
We regularly offer both wearable pieces and collectible items, ranging from elegant everyday jewelry to unusual vintage finds and rare specialist objects. Our selection changes frequently, with new lots added on a regular basis.
We are committed to professional service, secure packaging, careful handling, and reliable worldwide shipping. Whether you are a collector, dealer, investor, or simply searching for a unique piece, we aim to provide attractive objects at competitive auction prices.
Thank you for visiting ♛ The Jewelry Company ♛
Details
Free resizing offered
No
Total carat weight of all stones
0.75
Style
Modern
No. of main gemstones
10
Laboratory report
No laboratory report
Era
1900-2000
Total carat weight of main stone(s)
0.75
Metal
Yellow gold
Brand jewellery
No
Fineness
18 kt.
Main stone
Ruby
Total weight
2.86 g
Condition
Excellent condition - barely used with minimal signs of wear
Country of origin
Sweden
Gender
Women
Shape of main stone
Square
Cutting style of main stone
Squared emerald cut
Ring size
50 (EU) / 10 (IT) / 5 ¼ (US)
Sold by
Disclaimer
Catawiki always aims to offer you the best possible buying experience. Our experts virtually review and select every object in line with our submission guidelines. While we strive to provide a detailed description and photographs of each jewellery object, discrepancies or inaccuracies may occur. It is your responsibility to review all of the information provided about an object, including the condition and description, before placing an order. Sellers are responsible for the information, pictures and description provided, including the quality, quantity and nature of the jewelry supplied. A small imperfection that cannot be seen in the photo but is included in the description is not a non-conformity. A Lab Report is not a guarantee, valuation or appraisal regarding the articles described therein. A Lab Report contains only the characteristics of an article described after it has been graded, tested, examined, and analyzed using the techniques and equipment used at the time of the examination from that specific Lab. The results of any other examination performed on the article may differ depending when, how, by whom and with which grading standard the article is examined. In addition, any changes and improvements in techniques and equipment that may have occurred which may enable the examiner to detect, among other things, the use of processes for altering the characteristics of an article which use was previously undetectable, does not automatically mean the object does not conform to its description.
Catawiki always aims to offer you the best possible buying experience. Our experts virtually review and select every object in line with our submission guidelines. While we strive to provide a detailed description and photographs of each jewellery object, discrepancies or inaccuracies may occur. It is your responsibility to review all of the information provided about an object, including the condition and description, before placing an order. Sellers are responsible for the information, pictures and description provided, including the quality, quantity and nature of the jewelry supplied. A small imperfection that cannot be seen in the photo but is included in the description is not a non-conformity. A Lab Report is not a guarantee, valuation or appraisal regarding the articles described therein. A Lab Report contains only the characteristics of an article described after it has been graded, tested, examined, and analyzed using the techniques and equipment used at the time of the examination from that specific Lab. The results of any other examination performed on the article may differ depending when, how, by whom and with which grading standard the article is examined. In addition, any changes and improvements in techniques and equipment that may have occurred which may enable the examiner to detect, among other things, the use of processes for altering the characteristics of an article which use was previously undetectable, does not automatically mean the object does not conform to its description.
