How do I get more gems in castle story?

What is the closest great lake to lake Orion? Where is the Kendale Lakes Branch Library in Miami located? Why has the British colony of Gibraltar not been returned to Spain despite the latter's request that it be returned? What is a horse coral? Is Rocky Mountains 5000-10000 ft above sea level? What are the biotic and abiotic factors in the rainforest? Where can one purchase tickets to the Indian Pacific? Is there a lake in Hawaii? The African rainforest grows in the Congo Basin What large river and its tributaries run through the basin? Where did the Blue Ridge Parkway get its name? What famous document made Mississippi property of the US? What president helped build the Panama Canal? What is the best balsa wood bridge design? What is the longest river in China? What physical characteristics of the environment caused settlements to grow in the Connecticut River Valley? What is upper Thames called? The Nile Valley and the delta are areas with? Who are the tribal people who work as guides and helpers for Everest expedition? What was the rationale behind introducing wolves to the Greater Yellowstone Ecosystem (GYE)? Rain forests exist in each area except?