尼日利亚采购需求：布儒斯特角、浓度梯度晶体、倍频晶体、感应炉晶体、中红外晶体、钕玻璃激光器

I'm looking to kickstart a gem business and would appreciate any advice or insights you can share. Specifically, I'm interested in understanding the key steps to take when setting up the business, including sourcing gemstones, identifying reliable suppliers, and getting a handle on pricing strategies. Any tips on the best practices for inventory management and marketing would also be super helpful. Additionally, if you have any recommendations for essential tools or resources that could aid in the initial stages, I'd love to hear about them. Insights into industry trends and potential challenges new entrants face would be invaluable as I navigate this journey. Thanks in advance for your help!