钻石底尖是什么?

 　　zuanshidijianshishenme?dijianshizuanshidibudexiaomianjitingzi。(zhengshushangdemingchengshi：culet)，dijiankeyishiyigedianhuozheyigehenxiaodemian，qimianpingxingyutaimian。zuanshidijiandedaxiaotongchangshiyongyixiafanweibiaoshi：meiyou，feichangxiao，xiao，zhong，shaoda，da，feichangda。renhezhongdenghuojiaoxiaodijiandoushirouyanbukejiande，qieduizuanshiwaiguanmeiyourenhechadeyingxiang。danshi，ruguodijianshaodahuogengda，neimetabujinkejian，erqiehainengyunxuguangxiantongguo，neimeguangxianbiankeyicongtaimianzhijietongguodijianmian，congerjiangdilezuanshideguangcai。

　　genjugiatongyongguojibiaozhun，changjiandijianqingkuangkeyitongguo10beifangdajingxiaguanchadaodexianxianglaifenchengyixiajilei：

　　“jianrui”：suoyoudekemiandouwanhaodijiaohuiyuyidian;

　　“zhongdengjianrui”：xiaodebaisemoshali;

　　“mosun”：dadebaisemoshalidian;

　　“posun”：dijianyouposun，bixuzhongxinxiufu;

　　“henxiaodimian”：henxiaobabianxingdijiankemian，anyuchengheise，liangyuchengbaise;

　　“xiaodimian”：xiaobabianxingdijiankemian;

　　“zhongdengdimian”：zhongdengbabianxingdijiankemian;

　　“dadimian”：dababianxingdijiankemian。

　　zuanshiqiegongzaihendachengdushangjuedinglezuanshideshanshuochengdu，haodeqiegongkeyizuidaxiandudibajinruzuanshideguangxianfanshe，congerdadaohenhaodeshijuexiaoguo。zuanshidijianshishenme?dijiandeqingkuangyidingchengduyehuiyingxiangdaozuanshideshanliangchengdu。zhongxiaochengdudedijianyibanrouyanbukejian;danposunchengduda、huozheqiemomianguodadedijianyongrouyanjiukeyikandao，bingrongyizaochengzuanshilouguangdexianxiang。