SKU: 67225109949

DEGUSSIT® Ruby® Stones, Half Round 4" x 3/8"

Sale price$138.66 Regular price$154.07
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Description

DEGUSSIT® Ruby® Stones, Half Round 4" x 3/8"Gesswein Ruby Stones and Files are made by Friatec Degussit from pure, sintered crystals of synthetic ruby. No bonding material is used, so these stones are extremely hard and resistant to changes in shape. This is particularly important for quality precision grinding and finishing. In addition, since Gesswein Ruby Stones have an outstanding resistance to wear, they are more economical to use than other comparable tools. Use dry or with Gesswein

Gesswein Ruby Stones and Files are made by Friatec-Degussit from pure, sintered crystals of synthetic ruby. No bonding material is used, so these stones are extremely hard and resistant to changes in shape. This is particularly important for quality precision grinding and finishing.

In addition, since Gesswein Ruby Stones have an outstanding resistance to wear, they are more economical to use than other comparable tools.

Use dry or with Gesswein Stoning Oil to grind, touch up or debur steel and carbide parts. Ruby stones are also recommended for use on materials such as glass, quartz and porcelain.

All are 100mm (4") long, medium grit in a variety of shapes & sizes.

*All dimensions have tolerance of ±0.1mm.

Ruby Stones are the ideal choice for deburring, blending, dressing, and fine polishing of molds & dies made of hard metals such as hardened tool steel, carbide and surgical stainless steel. Jewelers use them for sharpening of carbide and high speed steel engravers and other tools.

Mold & Die Uses:
  • Deburring ejector pin holes.
  • General deburring and edge breaking on mold steel and carbide.
  • Blending a surface where a straight edge meets a radius.
  • Polishing highly detailed areas on dies (after dressing Ruby Stone to a fine point).
  • Ruby Midget Files (see "Related Products" below) can be used in an Ultrasonic Handpiece for fast deburring and blending in ribs and other hard to reach areas. Ruby Stones cut faster than our very popular Super Ceramic Stones.
Medical Instruments:
  • Fine polishing of surgical stainless steel instruments.
Jewellers and Engravers:
  • Polishing and shaping of carbide & high speed steel gravers.
These fine grinding stones are made of Degussit DD57 (sintered ruby) which is a homogenous mixed-crystal material. The main element is aluminum oxide. The characteristic red colour is the result of an admixture of chromium oxide.

Because Degussit DD57 is a homogenous ceramic material which is bondfree, these stones cannot be classified in terms of "grit" but only in terms of the average grain size. The average grain size of types "fine" and "medium" is about 10µ. Type "coarse" has two average grain sizes at about 10µ and 100µ.

No bonding material is used, so these stones and files are extremely hard and resistant to changes in shape. This is particularly important for quality precision grinding and finishing.

In addition, since Degussit Ruby Stones and Files feature outstanding resistance to wear, they are more economical to use than other comparable tools.

Use dry or with Gesswein Stoning Oil to grind, touch up or debur steel and carbide parts. Also recommended for use on materials such as glass, quartz and porcelain.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 67225109949

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Valeria Mayers
Port Orchard, US
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Kitchen organizer
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5 star appearance, material, no assembly just place cup in the fitted area. ! Holds all my washing tools, dish detergent, rubber gloves n dish rag together; perfect. I thought it would be too small. Fits perfectly on the sink top.
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Reviewed in the United States on April 12, 2026
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Natalia Correa B
Lake Worth, US
★★★★★ 5
Great product
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Loved it!! Great quality, arrived on time and it looks just like the picture !!
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Reviewed in the United States on January 22, 2026
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Rosario Salazar
Birmingham, US
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Excelente
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Nll
Pawtucket, US
★★★★★ 4
Good Compact Design
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Attractive design and space to store the dish brush and or sponge. My only criticism is that the pump spout is quite narrow so the liquid soap skims over and not that much is released with each pump.
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Squash Master
Belleville, US
★★★★★ 5
Good quality.
Color: Black
This is a very good quality and durable product. Nice addition to my kitchen sink top.
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Reviewed in the United States on February 21, 2026

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