South African "diamonds" are worthless quartz
2:30
South African "diamonds" are worthless quartz
Thousands bought into the dream that a tiny village in South Africa was sitting on hidden treasure. For many, it was a dream fueled by need, not a desire for riches.
CBS News2021年6月21日
Raw Diamond Identification
FAITH BLACK TV - Raw Diamond Diamond Diamond Brother Mike...
3:30
FAITH BLACK TV - Raw Diamond Diamond Diamond Brother Mike...
FacebookFAITH BLACK TV
已浏览 63.3万 次8 个月之前
How to Identify a Raw Diamond
How to Identify a Raw Diamond
thediamondauthority.org
2022年5月10日
How to Identify Raw Diamonds
How to Identify Raw Diamonds
wikiHowKennon Young
已浏览 42万 次5 个月之前
热门视频
All There Is to Know About the Blood Diamonds in Africa
All There Is to Know About the Blood Diamonds in Africa
thediamondauthority.org
2017年1月14日
S.Africa's diamond polishers look to lockdown lovers
2:03
S.Africa's diamond polishers look to lockdown lovers
YahooReuters Videos
2020年8月5日
‘Diamond rush’ in South African village after unidentified stones discovered
1:20
‘Diamond rush’ in South African village after unidentified stones discovered
FacebookAl Jazeera English
已浏览 35.6万 次2021年6月17日
Raw Diamond Mining
In the 1990s, commercial diamond mining began around Lac de Gras in the Northwest Territories of Canada. Since then, the Diavik Diamond Mine (bottom) and Ekati Diamond Mine (top) have produced a combined 15 million carats of diamonds each year — an annual output of 6,600 pounds (3,000 kg). The final frame shows a close-up view of Diavik, with its two primary open pits, waste ponds, processing facilities, and an airstrip capable of landing aircraft as large as 737s and C-130s. | Daily Overview
0:12
In the 1990s, commercial diamond mining began around Lac de Gras in the Northwest Territories of Canada. Since then, the Diavik Diamond Mine (bottom) and Ekati Diamond Mine (top) have produced a combined 15 million carats of diamonds each year — an annual output of 6,600 pounds (3,000 kg). The final frame shows a close-up view of Diavik, with its two primary open pits, waste ponds, processing facilities, and an airstrip capable of landing aircraft as large as 737s and C-130s. | Daily Overview
FacebookDaily Overview
已浏览 10.8万 次8 个月之前
Climate change: Investment in mining 'needs to nearly double' to achieve net zero, BofA says
Climate change: Investment in mining 'needs to nearly double' to achieve net zero, BofA says
aol.comGrace O'Donnell
2022年6月12日
Why diamonds and gold aren't making Africa richer
1:09
Why diamonds and gold aren't making Africa richer
DW.COMNeusa e Silva
2023年2月20日
反馈