Diamonds have been known since the sixth century to occur in Kalimantan, which are mostly derivedfrom placer deposits. The placer deposits are originally occurred in the 4 recent stream deposits or paleochannel deposits. The primary diamond derived from kimberlite, lamproite rock or deep seatedfault, is still not clearly known. Although the occurrences ofprimary diamond sources are st…
Batumulia dapat digolongkan dalam tiga bagian yakni; jenis batu permata (precious stones), setengah batu permata (semi precious stones ), dan jenis batu hias ( ornamental stones). Batumulia jenis batu permata adalah mineral yang mempunyai daya tarik yang terdapat di alam dan setelah dilakukan pemrosesan maka keindahannya semakin bertambah dari bentuk asalnya.Pada umumnya jenis batu permata …