![](https://nthumb.tpgimages.com/mid2_com_img/28103/24009/TOP22082979.jpg)
A sample of Graywacke. Greywacke (German grauwacke - signifying a grey rock) is a variety of sandstone generally characterized by its hardness, dark color, and poorly-sorted, angular grains of quartz and feldspar.
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Details
Creative#:
TOP22082979
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
N/A
Property Release:
No
Right to Privacy:
No
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