上面提了一点亭角和冠角的重要性,以下范围是参考mit一个精华帖,我根据我做的功课有些改动和补充
钻石最佳的黄金比例比较:
1.Total Depth Percentage全深比:57.5%-63%,严选60%-62%,我也有看到建议严选下限是59%的
2.Table Percentage 台宽比:52%-62%, 严选55-58%
3.Crown Angle 冠角:31.5-36.5度,严选34-35度
4.Crown Height Percentage 冠高比例: 12.5%-17%,严选 14-16%
5. Pavilion Angle 亭角: 40.4-41.8度,严选40.5-41.0度
6.Pavillion Depth Percentage 亭深比例: 42.5-44.5%,严选42.5-43.5.%
7.Star Facet Length Percentage 星面比例:45%-65%,严选55-60%
8. Lower Girdle Facet Percentage 腰下刻面比例:70%-85%,严选75-80%
9.Girdle Thickness 腰围厚度:Thin,Thin to Medium.,Thin to Slightly Thick, Medium, Medium to Slightly Thick, Slightly Thick.等六种, 严选 Slightly Thin to Medium, Medium, Medium to Slightly Thick等三种
10.Culet Size 底尖大小:None-very small,small,严选None (3克拉以上底尖磨面会
比较好,无底尖磨面,钻石容易破损。)(磨个底尖是不会磨损)
这里我扔一个可以看AGS评分的网页,[url=http://www.jewellerycatalogue.co.uk/diamonds/ags_detail.php]http://www.jewellerycatalogue.co.uk/diamonds/ags_detail.php[/url] ,AGS就是数字越小越好,所有加起来是AGS 0的就是ideal
顺便提一下,切割类型最早有2种:
美式切割(俗称火彩型切割)注重的是冠部略高,台面略小,火彩比较集中.缺点是直径偏小.
欧式切割(俗称明亮型切割)注重的是直径比较标准,台面略大,反射光范围较大.缺点是不如火彩型来得亮.
后来叫Tolkowsky的一个匠人找到2种切割之间最佳的平衡点,成为现代round brilliant cut的基础(后人有再modify),也是这里主要讨论的,所以其实是3种切割法
Brilliant Ideal Cut (BIC)
Tolkowsky Ideal Cut (TIC)
Fiery Ideal Cut (FIC)
其比较可以看这里[url=http://www.diamond-cut.com.au/23_bicfic.htm]http://www.diamond-cut.com.au/23_bicfic.htm[/url]
cheeryinmay 发表于 3/11/2014 3:36:16 PM [url=http://forums.huaren.us/showtopic.aspx?topicid=1584449&postid=62099007#62099007][/url]
0.9 I F VS1 0.96 $7,211 $7,511 61.9 / 56 35 / 40.6 None / None Medium to slightly thick
1.4 I F VS1 1.01 $7,609 $7,534 62.7 / 56 35.5 / 40.6 None / None Medium to slightly thick
1.6 I F VVS2 1.01 $7,438 $7,364 62.5 / 55 35 / 40.8 None / Medium Medium to slightly thick
2.3 I F VS1 1.05 $7,478 $7,122 62.3 / 56 36.5 / 40.6 None / Medium Medium
1.6 I F VS1 1 $7,450 $7,450 61.3 / 57 35 / 40.8 None / None thin to medium
1 I F VS1 1 $7,709 $7,709 61.9 / 55 34 / 40.8 None / None thin to slight thick
1.1 I F VS1 1 $7,973 $7,973 61.3 / 58 33.5 / 40.8 None / None Slightly thick to Slightly thick
1.1 I F VS1 1.01 $7,866 $7,788 59.9 / 59 32.5 / 41 None / Faint Medium to Slightly Thick, Faceted
1.6 I F VS1 0.9 $6,074 $6,749 62.1 / 55 35 / 40.8 None / Faint medium
MM, 我按你的讲解做的功课,挑出来几个,都带着各项数值,这样可吗?其实我找了有20几个,汗。已晕。请帮我选选看,只选一个,再汗一次,哈哈。
0.9 I F VS1 0.96 $7,211 $7,511 61.9 / 56 35 / 40.6 None / None Medium to slightly thick
1.4 I F VS1 1.01 $7,609 $7,534 62.7 / 56 35.5 / 40.6 None / None Medium to slightly thick
1.6 I F VVS2 1.01 $7,438 $7,364 62.5 / 55 35 / 40.8 None / Medium Medium to slightly thick
2.3 I F VS1 1.05 $7,478 $7,122 62.3 / 56 36.5 / 40.6 None / Medium Medium
1.6 I F VS1 1 $7,450 $7,450 61.3 / 57 35 / 40.8 None / None thin to medium
1 I F VS1 1 $7,709 $7,709 61.9 / 55 34 / 40.8 None / None thin to slight thick
1.1 I F VS1 1 $7,973 $7,973 61.3 / 58 33.5 / 40.8 None / None Slightly thick to Slightly thick
1.1 I F VS1 1.01 $7,866 $7,788 59.9 / 59 32.5 / 41 None / Faint Medium to Slightly Thick, Faceted
1.6 I F VS1 0.9 $6,074 $6,749 62.1 / 55 35 / 40.8 None / Faint medium
MM, 我按你的讲解做的功课,挑出来几个,都带着各项数值,这样可吗?其实我找了有20几个,汗。已晕。请帮我选选看,只选一个,再汗一次,哈哈。
呵呵呵呵 发表于 12/5/2014 2:57:58 AM [url=http://forums.huaren.us/showtopic.aspx?topicid=1584449&postid=65524797#65524797][/url]
x
到底了
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