GB2144622B - Gemstones and apparatus for their lapidation - Google Patents

Gemstones and apparatus for their lapidation

Info

Publication number
GB2144622B
GB2144622B GB08407316A GB8407316A GB2144622B GB 2144622 B GB2144622 B GB 2144622B GB 08407316 A GB08407316 A GB 08407316A GB 8407316 A GB8407316 A GB 8407316A GB 2144622 B GB2144622 B GB 2144622B
Authority
GB
United Kingdom
Prior art keywords
lapidation
gemstones
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB08407316A
Other versions
GB2144622A (en
GB8407316D0 (en
Inventor
Giovanni Colliva
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB8407316D0 publication Critical patent/GB8407316D0/en
Publication of GB2144622A publication Critical patent/GB2144622A/en
Application granted granted Critical
Publication of GB2144622B publication Critical patent/GB2144622B/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/02—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor by means of tools with abrading surfaces corresponding in shape with the lenses to be made
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/16—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of diamonds; of jewels or the like; Diamond grinders' dops; Dop holders or tongs
    • B24B9/168—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of diamonds; of jewels or the like; Diamond grinders' dops; Dop holders or tongs grinding peripheral, e.g. conical or cylindrical, surfaces

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Adornments (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
GB08407316A 1983-08-03 1984-03-21 Gemstones and apparatus for their lapidation Expired GB2144622B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT22408/83A IT1168707B (en) 1983-08-03 1983-08-03 EQUIPMENT FOR CUTTING GEMS WITH SPHERICAL FACETS AND GEMS SO OBTAINED

Publications (3)

Publication Number Publication Date
GB8407316D0 GB8407316D0 (en) 1984-04-26
GB2144622A GB2144622A (en) 1985-03-13
GB2144622B true GB2144622B (en) 1987-01-14

Family

ID=11195907

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08407316A Expired GB2144622B (en) 1983-08-03 1984-03-21 Gemstones and apparatus for their lapidation

Country Status (4)

Country Link
GB (1) GB2144622B (en)
IE (1) IE55064B1 (en)
IN (1) IN160559B (en)
IT (1) IT1168707B (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB581619A (en) * 1943-09-21 1946-10-18 Linde Air Prod Co Improvements in synthetic gem bodies and their manufacture
GB697804A (en) * 1949-12-21 1953-09-30 Union Carbide & Carbon Corp Improvements in and relating to the manufacture of synthetic corundum containing titanium
FR1564878A (en) * 1968-03-13 1969-04-25
IL39936A (en) * 1971-07-30 1975-04-25 De Beers Ind Diamond A diamond particle particularly for use in heat sinks
BE793007A (en) * 1971-12-20 1973-06-19 Union Carbide Corp PROCESS FOR MODIFYING THE APPEARANCE OF CORUNDUM CRYSTALS AND CRYSTALS THUS OBTAINED
US3742731A (en) * 1972-06-08 1973-07-03 Queensbury Opal Co Ltd Gem having light piping fibres with cores of high refractve index and clad layers of lower refractive index
IL58834A (en) * 1978-12-06 1982-12-31 Clarke Roger Maxwell Gemstone and method and device for cutting it

Also Published As

Publication number Publication date
IE55064B1 (en) 1990-05-09
IT8322408A0 (en) 1983-08-03
IE840686L (en) 1985-02-03
IT8322408A1 (en) 1985-02-03
GB2144622A (en) 1985-03-13
IT1168707B (en) 1987-05-20
GB8407316D0 (en) 1984-04-26
IN160559B (en) 1987-07-18

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950321