Iindidi zeedayimani ofuna ukuzazi ngaphambi kokuba uthenge idayimane

Iidayimani zihlala zithandwa ngabantu abaninzi, abantu bahlala bezithenga iidayimani njengezipho zeholide okanye ezinye, kodwa zininzi iidayimani, kodwa zininzi iidayimani, kufuneka uqonde iintlobo zedayimane.

Okokuqala, ngokwendlela yokwakhiwa kweCandelo

I-1. Ngokwemvelo idayimani
Eyona dayimani ebizayo emarikeni yenziwa ngokubanzi yi-crystalses malunga nexesha elikwindawo enobushushu kunye noxinzelelo (kunye nokunqongophala kwe-oxygen), kwaye iidayimani ezindala zifunyanwa minyaka le. Olu hlobo lwedayimani luphezulu kwixabiso kuba kunqabile.

I-2. Iidayimani zedayimani
Ngophuhliso lwenzululwazi netekhnoloji, zininzi iidayimani zedayimani ezikwimarike, kwaye abantu abaninzi banokwenza iidayimani ngeglasi, i-pinel, iZircontium, i-tircon, kunye nezinye izinto ezinjalo, kwaye ixabiso ledayimani liphantsi ngokubanzi. Kodwa kufanelekile ukuba uqaphele ukuba ezinye zezi dayimani zokwenziwa zibukeka ngcono kuneedayimani ezenziwe ngokwemvelo.

Okwesibini, ngokwenqanaba ledayimane ye-4C

1. Ubunzima
Ngokutsho kobunzima bedayimani, kokukhona bubunzima bedayimani, eyona nto ixabisekileyo yedayimane. Iyunithi esetyenziselwa ukulinganisa ubunzima bedayimani yi-carat (CT), kwaye enye icarat ilingana neegram ezimbini. Oko siqhele ukubiza amanqaku ali-10 kunye namanqaku angama-30 kukuba i-carat yahlulwa ibe yinxalenye ezili-100, nganye yenqaku elinye, oko kukuthi, amanqaku angama-9 yi-0.1 0.3 iikharathi, njalo njalo.

2. Faka umbala
Iidayimani zahlulwe ngombala, obhekisa kubunzulu bombala kunokuba luhlobo lombala ongezantsi. Ngokutsho kobunzulu bombala wedayimani ukumisela uhlobo lwedayimani, ukusondelelana nedayimani akunantsingiselo, kokukhona kuya kubandakanywa. Ukusuka kwiidayimani zeBanga le-D kwi-Z IBanga le-Z ifumana mnyama kwaye mnyama, i-DF ingenabala, i-GJ iphantse ingenamabala, kunye needayimani ze-K-GRAMID ziphulukana nexabiso labo elingqinayo.

I-3. Ukucaca
Iidayimani zahlulwe ngokucaca, oko kukoqobo ukuba icoceke idayimane. Ukucoceka kwedayimani kunokujongwa phantsi kwemicroscope yeshumi, kunye nokucacileyo okanye ngakumbi iimpazamo, ukukrala, njl njl. Ngokuqondwa kweedayimani ezinkulu zahlulwe zaba ziintlobo ezi-6, ngokulandelelana fl, ukuba, ii-VV, vs, s, i.

4. Sika
Yahlula idayimani evela ekunciphiseni, engcono ukunqunyulwa, kokukhona idayimani inokubonakalisa ukukhanya. Iimilo eziqhelekileyo zedayimani zedayimani ziintliziyo, isikwere, i-oval, ijikeleze umqamelo. Kule meko, iidayimani zahlulwe zangamacala amahlanu: ex, vg, g, inobulungisa kwaye ihlwempu.

Okwesithathu, ngokwecandelo lemibala yedayimani

I-1, idayimani engenabala
Iidayimani ezingenamibala zibhekisa kuhlobo olungenabala, oluphantse lube luhlaza okanye line-hiti ledayimani eliqaqambileyo, kwaye ukwahlulahlula iidayimani ezingenamibala kwezi zinemibala kokukhankanywa ngokungqinelana nobunzulu bemibala yokwahlulahlula.

I-2. Iidayimani ezinemibala
Isizathu sokusekwa kweedayimani ezinemibala kukutshintsha kwedayimani kukhokelela kumbala wedayimani, kwaye ngokombala owahlukileyo wedayimani, idayimane yahlulwe yangamagama amahlanu. Ngokwexabiso, yahlulwe yaba yiidayimani ezibomvu, iidayimani eziluhlaza, iidayimani eziluhlaza, iidayimani ezityheli kunye needayimani ezimnyama (ngaphandle kweedayimani ezizodwa).