Jewels with silver and gold / unique designs using precious and semi precious stones. › Rough black and white diamond necklace Image 1 of 1 Rough black and white diamond necklace $1,950.00 Rough black and white diamond neckpiece, 18kt gold chain with 22kt gold drop. Length of necklace is 18inches / 46cm. Add To Cart Added! Rough black and white diamond neckpiece, 18kt gold chain with 22kt gold drop. Length of necklace is 18inches / 46cm.