JPS5838843A - Color grade discriminating reference stone for diamond - Google Patents

Color grade discriminating reference stone for diamond

Info

Publication number
JPS5838843A
JPS5838843A JP13663581A JP13663581A JPS5838843A JP S5838843 A JPS5838843 A JP S5838843A JP 13663581 A JP13663581 A JP 13663581A JP 13663581 A JP13663581 A JP 13663581A JP S5838843 A JPS5838843 A JP S5838843A
Authority
JP
Japan
Prior art keywords
diamond
color
color grade
stone
discrimination
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.)
Pending
Application number
JP13663581A
Other languages
Japanese (ja)
Inventor
Masayuki Isomura
磯村　正行
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
Priority to JP13663581A priority Critical patent/JPS5838843A/en
Publication of JPS5838843A publication Critical patent/JPS5838843A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/87—Investigating jewels

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

PURPOSE:To enable a relatively easy production of a color grade discrimination reference stone and a universal discrimination of diamond by employing cubic zirconia (ZrO2) for the stone. CONSTITUTION:A small amount of a transition metal oxide or a rare earth oxide is added to a cubic ZrO2 to form a product comparable to the color grade of a natural diamond reference stone. This facilitates the discrimination of the color grade without requiring any costly natural product.

Description

【発明の詳細な説明】 ダイアモンドの品質は、一般にキズ（内包物）、色（カ
ラー）、カット（形状）、カラット（重さ、大きさ）等
の具合いによって評価される。DETAILED DESCRIPTION OF THE INVENTION The quality of a diamond is generally evaluated based on its flaws (inclusions), color, cut (shape), carat (weight, size), etc.

そしてこれらの点に関する検査鑑別も各国において夫々
一定の基準に基づいて公、私的に行われていることは周
知のとおりである。It is well known that inspections and differentiation regarding these points are carried out both publicly and privately in each country based on certain standards.

ところでダイアモンドの色（カラー）は、無色透明のも
のから黄色、時には褐色をおびている場合のものが多い
。そしてこの色具合いはダイアモンドの品質評価上、前
記の如く、亀わめて重要な要素であることから、その色
具合いの鑑別は極めて過圧なものでなければならない。By the way, the color of diamonds ranges from colorless and transparent to yellow and sometimes brownish. Since this color tone is an extremely important factor in evaluating the quality of diamonds, as mentioned above, the discrimination of the color tone must be extremely difficult.

そこで先ずダイアモンドの色具合いに一定の色等級（カ
ラー・グレーディング）ｔ−設定し、その色等級に相当
した天然ダイアモンド會基準石に用いて一般ダイアモン
ドの色等級１ｆｔ＠別している。Therefore, first, a certain color grading (t) is set for the color of the diamond, and a natural diamond society standard stone corresponding to that color grading is used to classify the color grading of general diamonds.

ところでアメリカ合衆国宝石学会（Ｑ、　Ｉ、　Ａ、）
等では、ダイアモンドの色等級としてダイアモンドの頭
文字であるＤカラーを最上位とし以下Ｅ、　　ｌ？、　
　Ｇ、　Ｈ，Ｉ、　　Ｊ、　Ｋ、　　Ｌ、　Ｍ、　Ｎ、
　　０．　　Ｐ、・・・、・・・・の如くアルファベッ
トが下がるほど等級も低くなり、Ｚカラーを最下位とす
る２３段階の等級を設定している。そして最上位のＤカ
ラーは完全無色透明のもので以下順次黄色味が目立つほ
ど色が悪いとされている。そして一般ダイアモンドの色
等級鑑別に当りては、あらかじめこれら色等級の判然と
している例え［Ｆ、　Ｑ、　Ｈ，Ｉ、　Ｊ。By the way, the Gemological Institute of America (Q, I, A,)
etc., the D color, which is the first letter of the diamond, is the highest color grade of diamond, and the following E, l? ,
G, H, I, J, K, L, M, N,
0. The lower the alphabet, the lower the grade, such as P, . The top D color is completely colorless and transparent, and the colors below are said to be worse as the yellowish tinge becomes more noticeable. When distinguishing the color grades of general diamonds, we use clear examples of these color grades [F, Q, H, I, J.

敵勢の天然ダイアモンドを、その順序にセットしたもの
を準備して、これら基準石（つけ石、マスターストゲン
）と一般のダイアモンドとを一定条件のもとにいちいち
対照識別してその色の等級づけを行なっている。しかし
てこれらいくつかの天然ダイアモンドの基準石を揃え七
準備することはその高い価格の点から言っても容易なこ
とではない。したがうて一般の宝石商や宝石鑑別士もダ
イアモンドの確実な色等級づけにＬかなり苦労している
のが実情である。Prepare enemy natural diamonds set in that order, compare and identify these reference stones (tack stones, master stones) and general diamonds under certain conditions, and determine their color grade. I'm doing the attaching. However, it is not easy to prepare these several natural diamond reference stones in view of their high prices. Therefore, the reality is that general jewelers and gemologists have considerable difficulty in accurately grading the color of diamonds.

ところで本発明は、この実情を克服すること量目的とし
て、アメリ去合衆国宝石学会認定宝石鑑別士（Ｇ、　Ｉ
、　Ａ、　Ｇ、　Ｇ、）でもある本発明者が自己の経験
等を参考にして貧峰覧ものである。By the way, the present invention is aimed at overcoming this situation, and is aimed at the Gemological Institute of America certified gemstone appraisers (G, I).
, A, G, G,) The inventor of the present invention, who is also a professor, has made this review based on his own experience and the like.

そしてその内答として紘、要するＩｃ１ｍ記基準石をキ
ュービック・ジルコニア（Ｚｒ０２　）にしたことであ
る。キュービック・ジルコニアがダイアモンドに類似す
る人造石の一種であることは言うまでもない。しかしこ
れを前記基準石としたのは本発明以外になく、シかもそ
の色勢級はキューピッ゛・り・ジルコニアに少量の遷移
金属酸化物または稀土類酸化物を添加することによって
前記天然ダイアモンド基準石の色等級に匹敵するものを
比較的容易に製造することができ１したがって廉価に入
手できる結果、前記天然ダイアモンド基準石による一般
ダイアモンドの色等級づけの難点をよく克服してその色
等級づけをきわめ容易にかつ普遍的に行うことができる
効果を有するものである。The answer was that Hiro decided to use cubic zirconia (Zr02) as the Ic1m reference stone. It goes without saying that cubic zirconia is a type of artificial stone similar to diamond. However, this invention is the only one that uses this as the reference stone, and the color grade may be obtained by adding a small amount of transition metal oxide or rare earth oxide to Cupid zirconia. As a result of the fact that diamonds comparable to the color grade of stones can be produced relatively easily and are available at low prices, the difficulty in grading the color of general diamonds using the natural diamond reference stones can be overcome and the color grading of diamonds can be carried out relatively easily. This has the effect of being extremely easy and universal.

出ａａ人　　磯　　村　　正　　行Aa person from Iso village Tadashi line

Claims (1)

【特許請求の範囲】[Claims] ダイアモンドの色等級鑑別基準石を、キエービックージ
ルコニアによって構成したととを特徴とするダイアモン
ドの色等級鑑別基準石。A diamond color grade discrimination reference stone characterized by a diamond color grade discrimination reference stone made of Kievik zirconia.
JP13663581A 1981-08-31 1981-08-31 Color grade discriminating reference stone for diamond Pending JPS5838843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13663581A JPS5838843A (en) 1981-08-31 1981-08-31 Color grade discriminating reference stone for diamond

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13663581A JPS5838843A (en) 1981-08-31 1981-08-31 Color grade discriminating reference stone for diamond

Publications (1)

Publication Number Publication Date
JPS5838843A true JPS5838843A (en) 1983-03-07

Family

ID=15179911

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13663581A Pending JPS5838843A (en) 1981-08-31 1981-08-31 Color grade discriminating reference stone for diamond

Country Status (1)

Country Link
JP (1) JPS5838843A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6042276A (en) * 1983-08-12 1985-03-06 日本タングステン株式会社 Zirconia black dressing material and manufacture
US6473164B1 (en) 2000-02-16 2002-10-29 Gemological Institute Of America, Inc. Systems, apparatuses and methods for diamond color measurement and analysis
US7260544B1 (en) 2000-10-12 2007-08-21 Gemological Institute Of America, Inc. System and methods for evaluating the appearance of a gemstone
USRE44963E1 (en) 1997-01-10 2014-06-24 Diamond Technologies, Inc. System and method for computerized evaluation of gemstones

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6042276A (en) * 1983-08-12 1985-03-06 日本タングステン株式会社 Zirconia black dressing material and manufacture
JPS6337060B2 (en) * 1983-08-12 1988-07-22 Nippon Tungsten
USRE44963E1 (en) 1997-01-10 2014-06-24 Diamond Technologies, Inc. System and method for computerized evaluation of gemstones
US6473164B1 (en) 2000-02-16 2002-10-29 Gemological Institute Of America, Inc. Systems, apparatuses and methods for diamond color measurement and analysis
US7260544B1 (en) 2000-10-12 2007-08-21 Gemological Institute Of America, Inc. System and methods for evaluating the appearance of a gemstone
US7834987B2 (en) 2000-10-12 2010-11-16 Gemological Institute Of America, Inc. Systems and methods for evaluating the appearance of a gemstone

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