发布时间:2025-01-31 16:53:02
1、看(方解石)白/黄斑,有白/黄斑存在基本认为是天然品,注意不是淡蓝色的斑纹,白斑和蓝色之间界限明显。
2、看墨绿色透辉石,有些青金石会存在墨绿色的透辉石杂质,而染色品基本没有,这也是鉴别要点。
3、看染料沉积,一般染色品在裂隙处颜色很深,可能为染料沉积。但不绝对,因为天然青金石中也会有黑纹/黑线。
4、试剂擦拭,取一粒待鉴定的珠子,用热水泡十分钟(除去表面可能干扰鉴定的蜡质),用丙酮/洗甲水/酒精擦拭,如果变蓝,基本可以认定为染色品。
单反镜头,不小心印上指印了,百度了一下说可以拿化妆棉擦,然后就变成这样了QAQ求补救方法,用镜头纸
2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02有个1瓦的led自己如何做强光手电已经有普通充电手电尸体电烙铁充电电池18650那种强光手电用的那
2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02想拆掉衣柜上的一个隔板但用十字起子卸不动请教下木工师傅该怎么卸这块板
2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02 2025-01-31 16:53:02