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"Tharsis Intense" in mirror polished and hot blued O1 high carbon tungsten vanadium tool steel blade, hand-engraved 304 stainless steel bolsters, Fossilized Stromatolite Gemstone handle, sheath in leather inlaid with black frogskin, stands of sculpted, hand-cast bronze
Tharsis

Sirona

"Sirona" chef's knife, obverse side view in mirror polished 440C high chromium stainless steel blade, 304 stainless steel bolsters, Green Orbicular Agate gemstone handle, slip sheath in kydex and 304 stainless steel fasteners
"Sirona" Fine Chef's Knife
  • Size (Knife): Length overall: 13.4" (34.0 cm), Blade Length (at cutting edge): 8.8" (22.4 cm), Thickness: .176" (4.5 mm)
  • Weight: Knife: 1 lb. (454 grams) Sheath: 10.5 oz. (298 grams)
  • Blade: 440C High Chromium Martensitic Stainless Tool Steel, Hardened and Tempered to Rockwell C61, mirror polished
  • Fittings/Bolsters: 304 Austenitic Stainless Steel, mirror polished
  • Handle: Polished Green Orbicular Agate Gemstone
  • Sheath: Kydex, 304 Stainless Steel Fasteners
  • Knife: The Sirona is named for a Celtic Goddess, a healing deity. This Sirona is a derivation of an old classic Sabatier chef's knife, but with some beautiful and unique distinctions. I designed this Sirona as a a singular piece that would accomplish most of the culinary cutting tasks with elegance and style. The Sirona has a striking yet reasonable  blade, substantially made of 440C high chromium martensitic tool steel, for extremely high corrosion resistance, high  wear resistance, and high toughness. The blade is deeply hollow ground and artistically milled for weight reduction and for easy freeing of cut foodstuffs from the blade. The entire blade body and milled artwork are polished inside and out for easy cleaning. I made this blade ultra-hard, 61 on the Rockwell C scale. The reason for this is ultimate edge holding ability. This Sirona has substantial milling and with this feature, needed to have plenty of hardness for minimal sharpening. That way, it will take many decades before the blade ever approaches the milling through sharpenings. Frankly, I wanted a tremendously long lasting, hard blade. I also made the spine thick enough to support the milled blade, and prevent all flexing. The high hardness has the added advantage of improved corrosion resistance over a softer blade, as 440C's corrosion resistance is higher the harder the blade is. The grinds are extremely well matched, side to side, and the curvature of the edge will offer great rocking motion on the board. The knife has a razor-keen single bevel cutting edge. The spine is generous, and the fully tapered tang has full vine hand filework throughout for  great handmade distinction. The knife is bolstered in zero-care 304 high nickel, high chromium austenitic stainless steel for the greatest toughness and corrosion resistance of any stainless steel. So tough is this steel, it is used for stainless nuts, bolts, and fasteners. So corrosion resistant is it that the finest stainless cookware is made of 304. The front bolster is sculpted with a pleasing geometry that allows a comfortable pinch grip or thumb rest along the spine, and it is contoured and polished throughout for comfort and easy cleaning. The rear bolster is angled and with a great drop for the heel of the palm and a good quillon, which makes the knife a pleasure to hold. The bolsters are dovetailed and bed a pair of beautiful polished Green Orbicular Agate gemstone handle scales, in which white agate orbs float in a body of green transparent and translucent agate. This is a very hard gemstone, with a glassy polished surface and it's durable and smoothly rounded for a wonderful feel. The balance point of the knife is exactly at the forefinger placement, and the knife feels strong and ready in the hand. The hard edge and point are unstoppable on the board; this is a serious, large and durable knife made for cutting.
  • Sheath: I made a durable, convenient slip sheath to protect the blade and other utensils and the hand, made in double thickness black kydex, with full kydex welts, secured with all 304 stainless steel Chicago screws for zero care. The sheath protects all the blade in storage yet leaves the handle easily accessible for quick use.
  • A fine chef's knife with a super-hard and highly corrosion resistant blade, ready for culinary creation.

Thanks, P. S.!


Hi Jay,
Your knife safely arrived about 2:00 PM today, It found a new home in my Kitchen, YEA. Thank you, I fell so blessed to have one of your works of art.

--P. S.


Please click on thumbnail photos
"Sirona" chef's knife, reverse side view. Blade is ultra-hard for high wear resistance and minimal sharpening for deeply milled blade and high longevity "Sirona" chef's knife, spine edgework, filework detail. Accurate and clean vine fileworkd along entire spine aids in grip and gives distinctive handmade detail "Sirona" Chef's Knife, spine edgework, filework detail. Thumb rest is contoured, rounded and comfortable 304 stainless steel, for zero care and high durability "Sirona" inside handle tang detail. Full Filework throughout fully tapered tang, dovetailed bolsters lock handle scales to bedded tang for permanence "Sirona" obverse side handle detail. Bolsters are rounded, contoured, smoothed and polished 304 stainless steel, in high nickel and high chromium, super tough and zero care "Sirona" obverse side blade detail. Creative and substantial milling reduces blade weight and allows easy release of cut foodstuffs, while being easy to clean "Sirona" fine chef's knife, reverse side handle detail. Front bolster has sculpted and polished front face, for easy cleaning, all handle surfaces rounded and smoothed for comfort "Sirona" handmade chef's knife, reverse side blade detail. Blade is ultra-hard 440C high chromium stainless steel for superb edge holding and high longevity with minimal sharpening. High hardness adds to corrosion resistance  "Sirona" fine handmade chef's knife, reverse side handle detail. Green Orbicular agate has white orbs floating in sea-green transparent agate, smoothed, rounded and polished for comfort "Sirona" fine handmade chef's knife, obverse side view of gemstone handle. Green Orbicular agate gemstone is beautiful and very durable, a hard agate smooth and polished to a glassy finish. "Sirona" fine handmade chef's knife, point detail. Blade is very hard for high wear resistance and corrosion resisitance with great longevity and minimal sharpening. "Sirona" fine handmade chef's knife, sheathed view. Sheath is a slip sheath for easy protection, in double thickness kydex with 304 stainless steel fasteners for high corrosion resistance, protecting blade but leaving plenty of handle for easy unsheathing

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